Is 240 a good study guide for the TExES Chemistry 7–12 (240)?

Yes. The 240 study guide is built around the official exam framework and this page shows detailed alignment domain by domain and competency by competency.

TExES Chemistry 7–12 (240) Study Guide Test Alignment

Q: How closely does 240 align to the TExES Chemistry 7–12 (240) exam?

This guide is 92% test-aligned based on a competency-by-competency review of the official framework and the study resources included in the guide.

Q: Does 240 cover every competency?

Coverage is shown transparently across covered, partially covered, and identified gaps: 94 covered, 19 partially covered, and 0 gaps across 113 competencies.

Q: What does "partially covered" mean?

Partially covered means the guide addresses the core parts of a competency, but some depth or subtopics may still be limited.

Why Test Alignment Matters for Your TExES Chemistry 7–12 Study Guide

Certification test standards are broad, but the exam questions are very specific. Our team of curriculum experts uses the 240 Study Guide Creation Process to ensure the most aligned, specific content for your TExES Chemistry 7–12 (240) test — so you are not wasting time on broad subject review that may not show up on exam day.

Why 240 Is the Best Choice for the TExES 240 Study Guide

✓Built around the official exam framework
✓Organized by the competencies actually used on the exam
✓Shows exactly what is covered and where depth is partial
✓Includes aligned questions, flashcards, study materials, and videos
✓Helps candidates study what is actually tested instead of broad generic content

Transparent coverage is a strength. We show where the guide is strong, where depth is partial, and where a gap has been identified so you can make an informed study decision.

How to Read This Alignment Review

4 domains · 113 competencies reviewed · 92% test-aligned

Covered— competency is comprehensively supported by the guide

Partially covered— core content is covered, but some depth gaps remain

Coverage gap identified— a content gap has been identified

✓

This study guide is based on the current official exam framework

We review and update alignment whenever the official framework changes so candidates are always studying current, accurate material.

SCIENTIFIC INQUIRY AND PROCESSES (DOMAIN I) Partially covered

SMR I.001 The teacher understands how to select and manage learning activities to ensure the safety of all students and the correct use and care of natural resources, materials, equipment and technologies.

235 Qs26 Materials115 Cards3 VideosPartially covered

Official Competency	Matching 240 Topics	Alignment	Qs	Mats	Cards	Vids	Notes
A. Uses current sources of information about laboratory safety, including safety regulations and guidelines for the use of science facilities, materials and equipment.	S.Safety Rules; S.Safety Organizations	Covered	28	1	2	0	Covered by 2 topics (28 questions, 1 materials, 2 cards, 0 videos).
B. Recognizes potential safety hazards in the laboratory and in the field and knows how to prevent accidents and apply procedures, including basic first aid, for responding to accidents.	S.Emergency Procedures	Partially covered	6	1	1	0	Partial coverage by 1 topic (6 questions, 1 materials, 1 cards, 0 videos); limited supporting content.
C. Employs safe practices in planning and implementing all instructional activities and designs and implements rules and procedures to maintain a safe learning environment.	S.Prelab Teaching Activities; S.Prepping for Lab - Mixing Concentrations	Partially covered	5	2	0	0	Partial coverage by 2 topics (5 questions, 2 materials, 0 cards, 0 videos); limited supporting content.
D. Understands procedures for selecting, maintaining and safely using chemicals, tools, technologies, materials, specimens and equipment, including procedures for the recycling, reuse and conservation of laboratory resources.	S.Safety Rules - Chemistry; S.Proper Handling - Chemicals; S.Microscopes; S.Maintaining Equipment	Covered	22	4	18	0	Covered by 4 topics (22 questions, 4 materials, 18 cards, 0 videos).
E. Knows how to use appropriate equipment and technology (e.g., Internet, spreadsheet, calculator) for gathering, organizing, displaying and communicating data in a variety of ways (e.g., charts, tables, graphs, diagrams, written reports, oral presentations).	M.Graphs and Plots; S.Best Chart for the Data; S.Proper Data Analysis; S.Trend Analysis of Scatterplots; S.Trend Analysis in Data; S.Integrating Digital Technology; S.Technology for Real-World Applications	Covered	82	7	29	2	Covered by 7 topics (82 questions, 7 materials, 29 cards, 2 videos).
F. Understands how to use a variety of tools, techniques and technology to gather, organize and analyze data; how to perform calculations and how to apply appropriate methods of statistical measures and analysis.	S.Choose Appropriate Equipment - Advanced; S.Proper Tool Use; S.Proper Tool Use - High; S.Various Tools; S.Scientific Lab Techniques	Covered	23	5	59	0	Covered by 5 topics (23 questions, 5 materials, 59 cards, 0 videos).
G. Knows how to apply techniques to calibrate measuring devices and understands concepts of precision, accuracy and error with regard to reading and recording numerical data from scientific instruments (e.g., significant figures).	S.Precision vs Accuracy; S.Error In Measurements; S.Significant Figures; S.Proper Tool Use	Covered	40	4	8	0	Covered by 4 topics (40 questions, 4 materials, 8 cards, 0 videos).
H. Uses the International System of Units (i.e., metric system) and performs unit conversions within and across measurement systems.	S.Metric System; S.Choosing Appropriate SI Units; S.Converting Units - Dimensional Analysis	Covered	34	3	6	1	Covered by 3 topics (34 questions, 3 materials, 6 cards, 1 videos).

SMR I.002 The teacher understands the nature of science and the process of scientific inquiry.

107 Qs9 Materials29 Cards3 VideosCovered

Official Competency	Matching 240 Topics	Alignment	Qs	Mats	Cards	Vids	Notes
A. Understands the nature of science, the predictive power of science and limitations to the scope of science (i.e., the types of questions that science can and cannot answer).	S.Nature of Science; S.Limits of Science	Covered	13	2	7	0	Covered by 2 topics (13 questions, 2 materials, 7 cards, 0 videos).
B. Knows the characteristics of various types of scientific investigations (e.g., descriptive studies, controlled experiments, comparative data analysis) and how and why scientists use different types of scientific investigations.	S.Experimental Investigations; S.Non-Experimental Investigations; S.Non-Experimental Investigations - Advanced	Covered	34	2	11	1	Covered by 3 topics (34 questions, 2 materials, 11 cards, 1 videos).
C. Understands principles and procedures for designing and conducting a variety of scientific investigations — with emphasis on inquiry-based investigations; understands how to communicate and defend scientific results; and understands the difference between a theory and a hypothesis.	S.Scientific Method; S.Prediction, Explanation, Theory, Fact	Covered	30	2	11	2	Covered by 2 topics (30 questions, 2 materials, 11 cards, 2 videos).
D. Understands how logical reasoning, verifiable observational and experimental evidence and peer review are used in the process of generating and evaluating scientific knowledge.	S.Repeatability; S.Observation vs Inference	Covered	16	2	6	0	Covered by 2 topics (16 questions, 2 materials, 6 cards, 0 videos).
E. Understands the relationships, similarities and differences between science and technology.	S.Interdisciplinary Connections	Covered	14	1	3	0	Covered by 1 topic (14 questions, 1 materials, 3 cards, 0 videos).

SMR I.003 The teacher understands the role of mathematics and unifying concepts common to all sciences.

130 Qs12 Materials41 Cards2 VideosCovered

Official Competency	Matching 240 Topics	Alignment	Qs	Mats	Cards	Vids	Notes
A. Knows the characteristics and general features of systems; how properties and patterns of systems can be described in terms of space, time, energy and matter; and how system components and different systems interact.	S.Systems Model; S.Properties of Systems; S.Change In Systems; S.Change, Constancy, and Measurements	Covered	48	4	14	0	Covered by 4 topics (48 questions, 4 materials, 14 cards, 0 videos).
B. Understands how to identify potential sources of error in an investigation, evaluate the validity of scientific data and develop and analyze different explanations for a given scientific result.	M.Observations, Conclusions, and Relationships	Covered	11	1	10	0	Covered by 1 topic (11 questions, 1 materials, 10 cards, 0 videos).
C. Knows how to apply and analyze the systems model (e.g., interacting parts, boundaries, input, output, feedback, subsystems) across the science disciplines	S.Evidence, Models, and Explanation; S.Models	Covered	25	2	5	0	Covered by 2 topics (25 questions, 2 materials, 5 cards, 0 videos).
D. Understands how shared themes and concepts (e.g., systems, order and organization; evidence, models and explanation; change, constancy and measurements; evolution and equilibrium; form and function) provide a unifying framework in science.	S.Form and Function; S.Change, Constancy, and Measurements; S.Evidence, Models, and Explanation	Covered	35	3	5	0	Covered by 3 topics (35 questions, 3 materials, 5 cards, 0 videos).
E. Understands how models are used to represent the natural world and how to evaluate the strengths and limitations of a variety of scientific models (e.g., physical, conceptual, mathematical).	S.Models	Covered	13	1	4	0	Covered by 1 topic (13 questions, 1 materials, 4 cards, 0 videos).
F. Understands the importance of mathematics in science and applies scientific conventions and mathematical methods (e.g., significant figures, scientific notation, dimensional analysis, statistical analysis, algebraic manipulation).	S.Measures of Center and Range; M.Exponential and Scientific Notation; M.Boxplots; S.Proper Data Analysis	Covered	34	4	10	2	Covered by 4 topics (34 questions, 4 materials, 10 cards, 2 videos).

SMR I.004 The teacher understands the history of science, how science impacts the daily IIves of students and how science interacts with and influences personal and societal decisions.

158 Qs16 Materials139 Cards1 VideosPartially covered

Official Competency	Matching 240 Topics	Alignment	Qs	Mats	Cards	Vids	Notes
A. Understands the historical development of science, key events in the history of science and the contributions that diverse cultures and individuals of both genders have made to scientific knowledge.	S.Key History of Science; S.Key History of Space Science; S.Diversity in Science History	Covered	32	3	109	0	Covered by 3 topics (32 questions, 3 materials, 109 cards, 0 videos).
B. Knows how to use examples from the history of science to demonstrate the changing nature of scientific theories and knowledge (i.e., that scientific theories and knowledge are always subject to revision in light of new evidence).	S.Key History of Science; S.Famous Experiments	Covered	23	2	60	0	Covered by 2 topics (23 questions, 2 materials, 60 cards, 0 videos).
C. Knows that science is a human endeavor influenced by societal, cultural and personal views of the world and knows that decisions about the use and direction of science are based on factors such as ethical standards, economics and personal and societal biases and needs.	S.Ethics	Covered	10	1	0	0	Covered by 1 topic (10 questions, 1 materials, 0 cards, 0 videos).
D. Understands the application of scientific ethics to the conducting, analyzing and publishing of scientific investigations.	S.Ethics and Regulation; S.Ethics and Publishing	Partially covered	1	2	4	0	Partial coverage by 2 topics (1 questions, 2 materials, 4 cards, 0 videos); limited supporting content.
E. Applies scientific principles, probability and risk/benefit analysis to analyze the advantages of, disadvantages of or alternatives to a given decision or course of action.	S.Decision Making	Covered	10	1	1	0	Covered by 1 topic (10 questions, 1 materials, 1 cards, 0 videos).
F. Understands the role science can play in helping to resolve personal, societal and global issues (e.g., recycling, population growth, disease prevention, resource use, evaluating product claims).	S.Human Populations Impact the Earth; S.Environmental Stewardship; S.Renewable vs Nonrenewable; S.Green Energy Technology; S.Human Influences on Climate; S.Global Warming; S.Ozone Depletion; S.Human Impact on Ecosystems	Covered	100	8	25	1	Covered by 8 topics (100 questions, 8 materials, 25 cards, 1 videos).

MATTER AND ENERGY (DOMAIN II) Partially covered

SMR II.005 The teacher understands the characteristics of matter.

153 Qs15 Materials85 Cards8 VideosCovered

Official Competency	Matching 240 Topics	Alignment	Qs	Mats	Cards	Vids	Notes
A. Differentiates between physical and chemical properties and changes of matter.	S.Physical Properties; S.Chemical Properties; S.Applications of Physical and Chemical Properties; S.Chemical vs Physical Changes	Covered	45	4	43	1	Covered by 4 topics (45 questions, 4 materials, 43 cards, 1 videos).
B. Explains the structure and properties of solids, liquids and gases.	S.States of Matter; S.Phase Changes; S.Kinetic Molecular Theory of Matter	Covered	36	3	12	2	Covered by 3 topics (36 questions, 3 materials, 12 cards, 2 videos).
C. Identifies and analyzes properties of substances (i.e., elements and compounds) and mixtures.	S.Elements and Compounds; S.Mixtures and Solutions; S.Electrical Conductor vs Insulator; S.Thermal Conductor vs Insulator	Covered	36	4	16	3	Covered by 4 topics (36 questions, 4 materials, 16 cards, 3 videos).
D. Identifies elements and isotopes by atomic number and mass number and calculates average atomic mass of an element.	S.Mass Number Calculation	Covered	15	1	4	1	Covered by 1 topic (15 questions, 1 materials, 4 cards, 1 videos).
E. Understands the structure, significance and history of the periodic table.	S.Periodic Table; S.Periodic Table Arrangement; S.Periodic Table - History of Development	Covered	21	3	16	1	Covered by 3 topics (21 questions, 3 materials, 16 cards, 1 videos).

SMR II.006 The teacher understands the structure and characteristics of atoms.

76 Qs9 Materials44 Cards1 VideosCovered

Official Competency	Matching 240 Topics	Alignment	Qs	Mats	Cards	Vids	Notes
A. Models the atom in terms of protons, neutrons and electron clouds.	S.Parts of an Atom	Covered	11	1	7	1	Covered by 1 topic (11 questions, 1 materials, 7 cards, 1 videos).
B. Understands atomic orbitals and electron configurations and describes the relationship between electron energy levels and atomic structure.	S.Electron Arrangements	Covered	9	1	7	0	Covered by 1 topic (9 questions, 1 materials, 7 cards, 0 videos).
C. Analyzes relationships among electron energy levels, photons and atomic spectra.	S.Molecular orbital theory - Shapes; S.Molecular Orbital Theory - Bond Order; S.Light Spectra; S.Dual Nature of Light	Covered	18	4	18	0	Covered by 4 topics (18 questions, 4 materials, 18 cards, 0 videos).
D. Applies the concept of periodicity to predict the physical properties (e.g., atomic and ionic radii) and chemical properties (e.g., electronegativity, ionization energy) of an element.	S.Periodic Table and Physical Properties; S.Periodic Table and Chemical Properties	Covered	32	2	8	0	Covered by 2 topics (32 questions, 2 materials, 8 cards, 0 videos).
E. Understands the historical development of atomic theory.	S.Atomic Models	Covered	6	1	5	0	Covered by 1 topic (6 questions, 1 materials, 5 cards, 0 videos).

SMR II.007 The teacher understands the properties of gases.

43 Qs6 Materials10 Cards0 VideosPartially covered

Official Competency	Matching 240 Topics	Alignment	Qs	Mats	Cards	Notes
A. Understands relationships among temperature, number of moles, pressure and volume of gases contained within a closed system.	S.Gas Laws	Covered	14	1	4	Covered by 1 topic (14 questions, 1 materials, 4 cards, 0 videos).
B. Analyzes data obtained from investigations with gases in a closed system and determines whether the data are consistent with the ideal gas law.	S.Gas Laws	Covered	14	1	4	Covered by 1 topic (14 questions, 1 materials, 4 cards, 0 videos).
C. Applies the gas laws (e.g., Charles’s law, Boyle’s law, combined gas law, Avogadro’s law) to describe and calculate gas behavior in a variety of systems.	S.Gas Laws	Covered	14	1	4	Covered by 1 topic (14 questions, 1 materials, 4 cards, 0 videos).
D. Applies Dalton’s law of partial pressure in various systems, as in collecting a gas over water.	S.Partial Pressures	Partially covered	4	1	2	Partial coverage by 1 topic (4 questions, 1 materials, 2 cards, 0 videos); limited supporting content.
E. Understands the relationship between kinetic molecular theory and the ideal gas law.	S.Kinetic Molecular Theory of Matter - Arrhenius; S.Kinetic Molecular Theory and Gas Laws	Covered	12	2	3	Covered by 2 topics (12 questions, 2 materials, 3 cards, 0 videos).
F. Knows how to apply the ideal gas law to analyze mass relationships between reactants and products in chemical reactions involving gases.	S.Stoichiometry of Gasses; S.Equilibrium and Gasses	Covered	13	2	2	Covered by 2 topics (13 questions, 2 materials, 2 cards, 0 videos).

SMR II.008 The teacher understands properties and characteristics of ionic and covalent bonds.

77 Qs10 Materials40 Cards0 VideosPartially covered

Official Competency	Matching 240 Topics	Alignment	Qs	Mats	Cards	Notes
A. Relates the electron configuration of an atom to its chemical reactivity.	S.Ions	Partially covered	6	1	4	Partial coverage by 1 topic (6 questions, 1 materials, 4 cards, 0 videos); limited supporting content.
B. Compares and contrasts characteristics of ionic and covalent bonds.	S.Types of Bonds; S.Single, Double, Triple Bonds	Covered	25	2	11	Covered by 2 topics (25 questions, 2 materials, 11 cards, 0 videos).
C. Applies the octet rule to construct Lewis structures.	S.Lewis Dot Structure	Partially covered	7	1	3	Partial coverage by 1 topic (7 questions, 1 materials, 3 cards, 0 videos); limited supporting content.
D. Identifies and describes the arrangement of atoms in molecules, ionic crystals, polymers and metallic substances.	S.Molecular Geometry	Covered	9	1	4	Covered by 1 topic (9 questions, 1 materials, 4 cards, 0 videos).
E. Understands the influence of bonding forces on the physical and chemical properties of ionic and covalent substances.	S.Hydrogen Bonds; S.Molecular Bonding - Polarity	Covered	12	2	3	Covered by 2 topics (12 questions, 2 materials, 3 cards, 0 videos).
F. Identifies and describes intermolecular and intramolecular forces.	S.Intermolecular and Intramolecular Forces	Covered	7	1	9	Covered by 1 topic (7 questions, 1 materials, 9 cards, 0 videos).
G. Uses intermolecular forces to explain the physical properties of a given substance (e.g., melting point, crystal structure).	S.Molecular Structure of Materials Affecting Physical Properties	Covered	6	1	19	Covered by 1 topic (6 questions, 1 materials, 19 cards, 0 videos).
H. Applies the concepts of electronegativity, electron affinity and oxidation state to analyze chemical bonds.	S.Intermolecular and Intramolecular Forces	Covered	7	1	9	Covered by 1 topic (7 questions, 1 materials, 9 cards, 0 videos).
I. Evaluates energy changes in the formation and dissociation of chemical bonds.	S.Bond Energy	Partially covered	5	1	3	Partial coverage by 1 topic (5 questions, 1 materials, 3 cards, 0 videos); limited supporting content.
J. Understands the relationship between covalent bonding, hybridization and molecular geometry.	S.Molecular Geometry	Covered	9	1	4	Covered by 1 topic (9 questions, 1 materials, 4 cards, 0 videos).

SMR II.009 The teacher understands and interprets chemical notation and chemical equations.

79 Qs8 Materials26 Cards0 VideosCovered

Official Competency	Matching 240 Topics	Alignment	Qs	Mats	Cards	Notes
A. Identifies elements, ions and compounds using scientific nomenclature.	S.Nomenclature	Covered	12	1	1	Covered by 1 topic (12 questions, 1 materials, 1 cards, 0 videos).
B. Uses and interprets symbols, formulas and equations in describing interactions of matter and energy in chemical reactions.	S.Chemical Formulas; S.Types of Reactions; S.Chemical Equations	Covered	26	3	16	Covered by 3 topics (26 questions, 3 materials, 16 cards, 0 videos).
C. Understands mass relationships involving percent composition, empirical formulas and molecular formulas.	S.Advanced Chemical Formulas	Covered	9	1	4	Covered by 1 topic (9 questions, 1 materials, 4 cards, 0 videos).
D. Interprets and balances chemical equations using conservation of atoms, mass and charge.	S.Balancing Chemical Reactions	Covered	14	1	1	Covered by 1 topic (14 questions, 1 materials, 1 cards, 0 videos).
E. Understands mass and mole relationships in chemical equations.	S.Stoichiometry	Covered	10	1	2	Covered by 1 topic (10 questions, 1 materials, 2 cards, 0 videos).
F. Solves stoichiometric problems, including limiting reagents, reaction yield and percent yield.	S.Stoichiometry; S.Stoichiometry - Limiting Reagents and Reaction Yield	Covered	18	2	4	Covered by 2 topics (18 questions, 2 materials, 4 cards, 0 videos).

SMR II.010 The teacher understands types and properties of solutions.

82 Qs11 Materials54 Cards0 VideosCovered

Official Competency	Matching 240 Topics	Alignment	Qs	Mats	Cards	Notes
A. Analyzes factors that affect solubility (e.g., temperature, pressure, polarity of solvents and solutes) and rate of dissolution (e.g., surface area, agitation).	S.Solubility; S.Solubility for Gases	Covered	12	1	4	Covered by 2 topics (12 questions, 1 materials, 4 cards, 0 videos).
B. Identifies characteristics of saturated, unsaturated and supersaturated solutions.	S.Types of Solutions	Covered	6	1	5	Covered by 1 topic (6 questions, 1 materials, 5 cards, 0 videos).
C. Determines the molarity, molality and percent composition of aqueous solutions.	S.Molarity; S.Percent Composition; S.Percent Solutions; S.Molality and Normality	Covered	21	4	11	Covered by 4 topics (21 questions, 4 materials, 11 cards, 0 videos).
D. Analyzes precipitation reactions and derives net ionic equations.	S.Ionic Dissolution; S.Precipitation Reactions	Covered	13	2	13	Covered by 2 topics (13 questions, 2 materials, 13 cards, 0 videos).
E. Analyzes the colligative properties of solutions (e.g., vapor-pressure lowering, osmotic pressure changes, boiling-point elevation, freezing-point depression).	S.Colligative Properties of Solutions	Covered	5	1	12	Covered by 1 topic (5 questions, 1 materials, 12 cards, 0 videos).
F. Understands the properties of electrolytes and explains the relationship between concentration and electrical conductivity.	S.Electrolytes	Covered	11	1	10	Covered by 1 topic (11 questions, 1 materials, 10 cards, 0 videos).
G. Analyzes models to explain the structural properties of water and evaluates the significance of water as a solvent in living organisms and the environment.	S.Properties of Water	Covered	14	1	6	Covered by 1 topic (14 questions, 1 materials, 6 cards, 0 videos).

SMR II.011 The teacher understands energy transformations that occur in physical and chemical processes.

56 Qs8 Materials26 Cards1 VideosCovered

Official Competency	Matching 240 Topics	Alignment	Qs	Mats	Cards	Vids	Notes
A. Analyzes the energy transformations that occur in phase transitions.	S.Phase Diagrams	Covered	6	1	7	0	Covered by 1 topic (6 questions, 1 materials, 7 cards, 0 videos).
B. Solves problems in calorimetry (e.g., determining the specific heat of a substance, finding the standard enthalpy of formation and reaction of substances).	S.Enthalpy; S.Enthalpy - Hess's Law; S.Calculations with Specific Heat; S.Calorimetry and System Energy	Covered	23	4	13	0	Covered by 4 topics (23 questions, 4 materials, 13 cards, 0 videos).
C. Applies the law of conservation of energy to analyze and evaluate energy exchanges that occur in exothermic and endothermic processes.	S.Endothermic vs Exothermic; S.Conservation of Energy Calculations	Covered	20	2	4	1	Covered by 2 topics (20 questions, 2 materials, 4 cards, 1 videos).
D. Understands thermodynamic relationships among spontaneous reactions, entropy, enthalpy, temperature and Gibbs free energy.	S.Spontaneity	Covered	7	1	7	0	Covered by 1 topic (7 questions, 1 materials, 7 cards, 0 videos).

CHEMICAL REACTIONS (DOMAIN III) Partially covered

SMR III.012 The teacher understands chemical kinetics and equiIIbrium.

32 Qs5 Materials31 Cards0 VideosPartially covered

Official Competency	Matching 240 Topics	Alignment	Qs	Mats	Cards	Notes
A. Analyzes factors (e.g., temperature, pressure, concentration, catalysts) that influence the rate of a chemical reaction.	S.Reaction Rates	Partially covered	5	1	1	Partial coverage by 1 topic (5 questions, 1 materials, 1 cards, 0 videos); limited supporting content.
B. Solves problems involving rate laws and determines the rate law of a reaction from experimental data.	S.Reaction Rates - Rate Law	Partially covered	6	1	3	Partial coverage by 1 topic (6 questions, 1 materials, 3 cards, 0 videos); limited supporting content.
C. Understands principles of chemical equilibrium.	S.Equilibrium	Covered	7	1	6	Covered by 1 topic (7 questions, 1 materials, 6 cards, 0 videos).
D. Solves problems involving principles of chemical equilibrium.	S.Calculating Equilibrium Constants	Covered	8	1	1	Covered by 1 topic (8 questions, 1 materials, 1 cards, 0 videos).
E. Identifies the chemical properties of a variety of common household chemicals (e.g., baking soda, bleach, ammonia) in order to predict the potential for chemical reactivity.	S.Chemical Reactions in Real Life	Covered	6	1	22	Covered by 1 topic (6 questions, 1 materials, 22 cards, 0 videos).

SMR III.013 The teacher understands acids, bases and their reactions.

81 Qs11 Materials31 Cards1 VideosPartially covered

Official Competency	Matching 240 Topics	Alignment	Qs	Mats	Cards	Vids	Notes
A. Identifies the general properties of and relationships among acids, bases and salts.	S.Acid/Base Classifications; S.Neutralization	Covered	16	2	8	0	Covered by 2 topics (16 questions, 2 materials, 8 cards, 0 videos).
B. Identifies acids and bases by using models of Arrhenius, Brønsted-Lowry and Lewis.	S.Acid/Base Classifications; S.Acid/Base Conjugates	Covered	17	2	11	0	Covered by 2 topics (17 questions, 2 materials, 11 cards, 0 videos).
C. Differentiates between strong and weak acids and bases.	S.pH; S.pH and Ka values; S.Acid/Base Strength	Covered	27	3	7	1	Covered by 3 topics (27 questions, 3 materials, 7 cards, 1 videos).
D. Applies the relationship between hydrogen ion concentration and pH for acids and bases.	S.pH and Ion Concentrations	Covered	8	1	0	0	Covered by 1 topic (8 questions, 1 materials, 0 cards, 0 videos).
E. Understands and analyzes acid-base equilibria and buffers.	S.Buffers	Covered	8	1	2	0	Covered by 1 topic (8 questions, 1 materials, 2 cards, 0 videos).
F. Analyzes and applies the principles of acid-base titration.	S.Acid/Base Titrations	Partially covered	5	1	5	0	Partial coverage by 1 topic (5 questions, 1 materials, 5 cards, 0 videos); limited supporting content.
G. Analyzes neutralization reactions based on the principles of solution concentration and stoichiometry.	S.pH to Molarity	Partially covered	5	1	3	0	Partial coverage by 1 topic (5 questions, 1 materials, 3 cards, 0 videos); limited supporting content.
H. Describes the effects of acids and bases in the real world (e.g., acid precipitation, physiological buffering).	S.Acid Rain	Partially covered	5	1	2	0	Partial coverage by 1 topic (5 questions, 1 materials, 2 cards, 0 videos); limited supporting content.

SMR III.014 The teacher understands oxidation and reduction reactions.

41 Qs6 Materials32 Cards0 VideosPartially covered

Official Competency	Matching 240 Topics	Alignment	Qs	Mats	Cards	Notes
A. Determines the oxidation state of ions and atoms in compounds.	S.Oxidation Number Examples	Covered	11	1	1	Covered by 1 topic (11 questions, 1 materials, 1 cards, 0 videos).
B. Identifies and balances oxidation and reduction reactions.	S.Redox Reactions	Partially covered	7	1	1	Partial coverage by 1 topic (7 questions, 1 materials, 1 cards, 0 videos); limited supporting content.
C. Uses reduction potentials to determine whether a redox reaction will occur spontaneously.	S.Reduction Potentials	Partially covered	6	1	1	Partial coverage by 1 topic (6 questions, 1 materials, 1 cards, 0 videos); limited supporting content.
D. Explains the operating principles of electrochemical cells and the process of electroplating metals.	S.Redox Reactions - Applications; S.Types of Voltage Sources	Covered	11	2	9	Covered by 2 topics (11 questions, 2 materials, 9 cards, 0 videos).
E. Analyzes applications of oxidation and reduction reactions from everyday life (e.g., combustion, corrosion, electroplating, batteries).	S.Chemical Reactions in Real Life	Covered	6	1	22	Covered by 1 topic (6 questions, 1 materials, 22 cards, 0 videos).

SMR III.015 The teacher understands nuclear fission, nuclear fusion and nuclear reactions.

47 Qs7 Materials14 Cards0 VideosPartially covered

Official Competency	Matching 240 Topics	Alignment	Qs	Mats	Cards	Notes
A. Uses models to explain radioactivity and types of radioactive decay (i.e., alpha, beta, gamma).	S.Radioactivity; S.Stable/Unstable Isotopes	Covered	18	2	11	Covered by 2 topics (18 questions, 2 materials, 11 cards, 0 videos).
B. Interprets and balances equations for nuclear reactions.	S.Balancing Nuclear Equations	Covered	8	1	4	Covered by 1 topic (8 questions, 1 materials, 4 cards, 0 videos).
C. Compares and contrasts fission and fusion reactions.	S.Fission; S.Fusion	Partially covered	6	2	2	Partial coverage by 2 topics (6 questions, 2 materials, 2 cards, 0 videos); limited supporting content.
D. Knows how to use the half-life of radioactive elements to study real-world problems (e.g., carbon dating, radioactive tracers).	S.Half-life Calculations	Covered	10	1	1	Covered by 1 topic (10 questions, 1 materials, 1 cards, 0 videos).
E. Identifies various issues associated with using nuclear energy (e.g., medical, commercial, environmental).	S.Applications of Radioactivity	Partially covered	5	1	1	Partial coverage by 1 topic (5 questions, 1 materials, 1 cards, 0 videos); limited supporting content.

SCIENCE LEARNING, INSTRUCTION AND ASSESSMENT (DOMAIN IV) Partially covered

SMR IV.016 The teacher understands research-based theoretical and practical knowledge about teaching science, how students learn science and the role of scientific inquiry in science instruction.

177 Qs21 Materials82 Cards3 VideosPartially covered

Official Competency	Matching 240 Topics	Alignment	Qs	Mats	Cards	Vids	Notes
A. Knows research-based theories about how students develop scientific understanding and how developmental characteristics, prior knowledge, experience and attitudes of students influence science learning.	S.Differentiation; S.Major Science Instructional Theories	Covered	10	2	3	0	Covered by 2 topics (10 questions, 2 materials, 3 cards, 0 videos).
B. Understands the importance of respecting student diversity by planning activities that are inclusive by selecting and adapting science curricula, content, instructional materials and activities to meet the interests, knowledge, understanding, abilities (possible career paths) and experiences of all students, including English-language learners and students with special needs.	S.Diversity; S.ELL; S.Teaching Scientific Vocabulary; ELA.Cross-Curricular Applications - Reading Comprehension (Science); ELA.Cross-Curricular Applications - Academic Vocabulary (Science)	Covered	27	5	28	0	Covered by 5 topics (27 questions, 5 materials, 28 cards, 0 videos).
C. Knows how to plan and implement strategies to encourage student self-motivation and engagement in their own learning (e.g., linking inquiry-based investigations to students’ prior knowledge, focusing inquiry-based instruction on issues relevant to students, developing instructional materials using situations from students’ daily lives, fostering collaboration among students).	S.Engagement; S.Inquiry; S.Activities for Inquiry - Secondary	Covered	50	3	16	1	Covered by 3 topics (50 questions, 3 materials, 16 cards, 1 videos).
D. Knows how to use a variety of instructional strategies to ensure all students comprehend content-related texts, including how to locate, retrieve and retain information from a range of texts and technologies.	S.Fostering Scientific Skills; S.Background Research	Covered	24	2	7	1	Covered by 2 topics (24 questions, 2 materials, 7 cards, 1 videos).
E. Understands the science teacher’s role in developing the total school program by planning and implementing science instruction that incorporates school-wide objectives and the statewide curriculum as defined in the Texas Essential Knowledge and Skills (TEKS).	S.Schoolwide Science TEKS	Partially covered	0	1	1	0	Partial coverage by 1 topic (0 questions, 1 materials, 1 cards, 0 videos); limited supporting content.
F. Knows how to design and manage the learning environment (e.g., individual, small-group, whole-class settings) to focus and support student inquiries and to provide the time, space and resources for all students to participate in field, laboratory, experimental and nonexperimental scientific investigation.	S.Inquiry	Covered	22	1	4	1	Covered by 1 topic (22 questions, 1 materials, 4 cards, 1 videos).
G. Understands the rationale for using active learning and inquiry methods in science instruction and understands how to model scientific attitudes such as curiosity, openness to new ideas and skepticism.	S.Active Learning; S.Inquiry	Covered	34	2	10	1	Covered by 2 topics (34 questions, 2 materials, 10 cards, 1 videos).
H. Knows principles and procedures for designing and conducting an inquiry-based scientific investigation (e.g., making observations; generating questions; researching and reviewing current knowledge in light of existing evidence; choosing tools to gather and analyze evidence; proposing answers, explanations and predictions; communicating and defending results).	S.Variety of Methods Across Science; S.Sections of a Lab Report; S.Read Scientific Publication; S.Credible Sources	Covered	29	4	14	1	Covered by 4 topics (29 questions, 4 materials, 14 cards, 1 videos).
I. Knows how to assist students with generating, refining, focusing and testing scientific questions and hypotheses.	S.Activities for Inquiry - Secondary	Covered	17	1	12	0	Covered by 1 topic (17 questions, 1 materials, 12 cards, 0 videos).
J. Knows strategies for assisting students in learning to identify, refine and focus scientific ideas and questions guiding an inquiry-based scientific investigation; learning to develop, analyze and evaluate different explanations for a given scientific result; and learning to identify potential sources of error in an inquiry-based scientific investigation.	S.Activities for Inquiry - Secondary	Covered	17	1	12	0	Covered by 1 topic (17 questions, 1 materials, 12 cards, 0 videos).
K. Understands how to implement inquiry strategies designed to promote the use of higher-level thinking skills, logical reasoning and scientific problem solving in order to move students from concrete to more abstract understanding.	S.Critical Thinking; S.Activities For Critical Thinking	Covered	14	2	1	0	Covered by 2 topics (14 questions, 2 materials, 1 cards, 0 videos).
L. Knows how to guide students in making systematic observations and measurements.	M.Measurement Principles	Covered	11	1	9	0	Covered by 1 topic (11 questions, 1 materials, 9 cards, 0 videos).
M. Knows how to sequence learning activities in a way that uncovers common misconceptions, allows students to build upon their prior knowledge and challenges them to expand their understanding of science.	S.Activities for Inquiry - Secondary	Covered	17	1	12	0	Covered by 1 topic (17 questions, 1 materials, 12 cards, 0 videos).

SMR IV.017 The teacher knows how to monitor and assess science learning in laboratory, field and classroom settings.

71 Qs5 Materials18 Cards3 VideosPartially covered

Official Competency	Matching 240 Topics	Alignment	Qs	Mats	Cards	Vids	Notes
A. Knows how to use formal and informal assessments (e.g., projects, laboratory reports and field journals, rubrics, portfolios, student profiles, checklists) of student performance and products to evaluate student participation in and understanding of inquiry-based scientific investigations.	S.Assessment and Instruction - Science; S.Rubrics in Assessment	Covered	49	2	8	1	Covered by 2 topics (49 questions, 2 materials, 8 cards, 1 videos).
B. Connects assessment to instruction in the science curriculum (e.g., designing assessments to match learning objectives, using assessment results to inform instructional practice).	S.Assessment and Instruction - Science	Covered	42	1	6	1	Covered by 1 topic (42 questions, 1 materials, 6 cards, 1 videos).
C. Knows the importance of monitoring and assessing students’ understanding of science concepts and skills on an ongoing basis by using a variety of appropriate assessment methods (e.g., performance assessment, self-assessment, peer assessment, formal/informal assessment).	S.Misconceptions; S.Evaluate Student Solutions	Covered	17	2	2	1	Covered by 2 topics (17 questions, 2 materials, 2 cards, 1 videos).
D. Understands the purposes and characteristics of and uses various types of assessment in science, including formative and summative assessments, and the importance of limiting the use of an assessment to its intended purpose.	S.Variety of Assessment	Partially covered	0	0	6	0	Partial coverage by 1 topic (0 questions, 0 materials, 6 cards, 0 videos); limited supporting content.
E. Understands strategies for assessing students’ prior knowledge and misconceptions about science and how to use those assessments to develop effective ways to address the misconceptions.	S.Misconceptions	Covered	14	1	2	1	Covered by 1 topic (14 questions, 1 materials, 2 cards, 1 videos).
F. Understands characteristics of assessments (such as reliability, validity and the absence of bias) in order to evaluate assessment instruments and their results.	S.Fair Assessment	Covered	5	1	6	1	Covered by 1 topic (5 questions, 1 materials, 6 cards, 1 videos).
G. Understands the role of assessment as a learning experience for students and strategies for engaging students in meaningful self-assessment and peer assessment.	S.Assessment and Instruction - Science	Covered	42	1	6	1	Covered by 1 topic (42 questions, 1 materials, 6 cards, 1 videos).
H. Recognizes the importance of selecting assessment instruments and methods that provide all students with adequate opportunities to demonstrate their achievements.	S.Assessment and Instruction - Science	Covered	42	1	6	1	Covered by 1 topic (42 questions, 1 materials, 6 cards, 1 videos).
I. Recognizes the importance of clarifying teacher expectations and student achievement by sharing evaluation criteria and assessment results with students and other appropriate educational stakeholders.	S.Rubrics in Assessment	Partially covered	7	1	2	0	Partial coverage by 1 topic (7 questions, 1 materials, 2 cards, 0 videos); limited supporting content.

How 240 Creates The TExES Chemistry 7–12 (240) Study Guide

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Every 240 study guide starts with the official exam framework. From there, we organize lessons, practice, and study tools around the categories the exam uses to measure candidate knowledge.

1

Review the official exam framework

We begin with the standards, domains, competencies, objectives, or content categories published by the testing authority.

2

Map the tested categories

We map every major area the exam is designed to cover so the guide reflects the real structure of the test.

3

Build lessons around tested content

We create study materials to support the official blueprint, not broad filler content.

4

Cross-check practice against exam expectations

We review practice content against the framework and real exam patterns so preparation stays targeted.

5

Review and update as standards change

When official frameworks change, we review guides and update alignment as needed.

Reviewed by subject-matter experts and maintained to reflect current standards.

Why 240 Is Better Than Other Generic Study Guides

Not all study guides are built the same way. Here is what separates a test-aligned guide from a generic one — and why it matters when you are preparing for the TExES Chemistry 7–12.

Generic

Generic Prep

✕Covers broad subject areas without structure

✕No clear connection to the official exam framework

✕Practice questions may not reflect the real test format

✕May not update when official standards change

~Can be helpful for quick, broad review

Test-aligned

240 Test-Aligned TExES 240 Prep

✓Every lesson maps to an official domain or competency

✓Built directly from the official exam framework

✓Practice questions aligned to what the exam actually measures

✓A clear study path by tested category

✓Study smarter and enter test day more prepared

FAQs About the TExES Chemistry 7–12 Study Guide

The questions teacher candidates ask us most often about the TExES Chemistry 7–12 study guide.

1

Is 240 a good study guide for TExES Chemistry 7–12?

240 is a strong option because the guide is built around the official exam framework and shows detailed alignment by SMR and competency.

2

How closely does 240 align to the TExES 240 exam?

This guide is 92% aligned based on a competency-by-competency review of the official framework and the study resources included in the guide.

3

Does 240 cover every competency?

This page shows coverage transparently across covered, partially covered, and identified gaps so candidates can see exactly how the guide maps to the exam.

4

What does “partially covered” mean?

Partially covered means the guide addresses the core parts of a competency, but some depth or subtopics may still be limited.

240's TExES Chemistry 7–12 Study Guide Is 92% Test-Aligned