Atomic Concepts
Subatomic particles, isotopes, atomic models (Dalton → wave-mechanical), electron configurations, ground vs. excited state, bright-line spectra, ion formation.
NYS Regents · Physical Setting / Chemistry
All ten topics
The Regents draws every question from this list. The percentages are NYSED's approximate weightings across Part A (35 multiple-choice questions), Part B (multiple choice plus short constructed response), and Part C (extended constructed response).
Periodic Table
Mendeleev to Moseley, the four periodic trends, families (alkali, alkaline earth, halogen, noble gas), metals vs. nonmetals vs. metalloids, Table S.
Moles & Stoichiometry
The mole, Avogadro's number, molar mass, percent composition, empirical/molecular formulas, balancing, the five reaction types.
Chemical Bonding
Ionic, covalent, metallic; Lewis structures; molecular geometry; polar vs. nonpolar; intermolecular forces; compound naming.
Physical Behavior of Matter
KMT, phase changes, heating/cooling curves, gas laws, vapor pressure, solubility curves, molarity, colligative properties.
Kinetics & Equilibrium
Rates, collision theory, activation energy, PE diagrams, enthalpy and entropy, dynamic equilibrium, Le Chatelier's Principle.
Organic Chemistry
Carbon bonding, hydrocarbons, IUPAC naming, functional groups (Table R), isomers, organic reactions including esterification and saponification.
Oxidation–Reduction
Oxidation numbers, half-reactions, balancing redox, voltaic vs. electrolytic cells, the Activity Series (Table J).
Acids, Bases & Salts
Arrhenius vs. Brønsted-Lowry, the pH scale and indicators, neutralization, titration math, electrolytes.
Nuclear Chemistry
Alpha, beta, gamma, positron decay; natural and artificial transmutation; half-life; fission vs. fusion; applications.