The SAT Subject Test in Chemistry assesses a student's knowledge of various science concepts. It covers a wide range of topics that are typically taught in a high school chemistry course. Here are some of the key science concepts tested on the exam:


- Atomic structure: Students should understand the structure of atoms, including the arrangement of protons, neutrons, and electrons.
- Periodic table: Familiarity with the periodic table is essential, including the trends in atomic size, ionization energy, and electronegativity.
- Chemical bonding: Students must be proficient in understanding different types of chemical bonds, such as ionic, covalent, and metallic bonds.
- Molecular structure: Knowledge of molecular geometry, Lewis structures, and intermolecular forces is crucial.


- Gas laws: Understanding the relationships between pressure, volume, temperature, and the number of particles in a gas (ideal gas law, Boyle's law, Charles's law, etc.).
- Liquids and solids: Knowledge of properties and behavior of liquids and solids, such as phase changes, vapor pressure, and types of solids (ionic, molecular, metallic).


- Stoichiometry: Ability to balance chemical equations and perform calculations involving moles, mass, and volume relationships.
- Reaction types: Identification of different types of chemical reactions, including synthesis, decomposition, combustion, and redox reactions.
- Reaction rates and equilibrium: Understanding factors that affect reaction rates and predicting the direction of a reaction at equilibrium.


- Acids and bases: Knowledge of acid-base theories, pH, indicators, and calculation of pH/pOH.
- Oxidation-reduction reactions: Understanding oxidation states, assigning oxidation numbers, and balancing redox equations.
- Periodic trends and properties: Knowledge of trends in atomic radius, ionization energy, electron affinity, and electronegativity across the periodic table.


- Data analysis: Ability to interpret and analyze experimental data, including graphs, tables, and experimental observations.
- Laboratory techniques: Understanding of common laboratory equipment, safety procedures, and basic laboratory techniques.
- Experimental design: Familiarity with designing and interpreting experiments, including controlling variables and drawing conclusions.

It is important for students to thoroughly review these science concepts and practice solving related problems to perform well on the SAT Subject Test in Chemistry.