100+ Free RISE Science — Chemistry Practice Questions

SEEd Strand CHEM.1: The Structure and Properties of Atoms

Explores the internal structure of atoms, isotopes, electron configurations ($1s^2 2s^2 2p^6...$), valence shell dynamics, emission spectra, effective nuclear charge, and periodic trends including atomic radius, first ionization energy, electronegativity, and ionic radii across periods and groups.

SEEd Strand CHEM.2: The Structure and Properties of Molecules

Investigates ionic, covalent, and metallic bonding models based on electronegativity differences, Lewis electron dot structures, octet rule exceptions, VSEPR molecular shapes (linear, bent, trigonal planar, tetrahedral, trigonal pyramidal), dipole moments, and intermolecular forces (LDF, dipole-dipole, hydrogen bonding).

SEEd Strand CHEM.3: Stability and Change in Chemical Systems

Focuses on balancing chemical equations, classifying reaction types (synthesis, decomposition, single replacement, double replacement, combustion), mole calculations using Avogadro's number ($6.022 \times 10^{23}$ particles/mol), mole-to-mass and mass-to-mass stoichiometry, limiting reactant determination, theoretical vs actual percent yield, and solution molarity.

SEEd Strand CHEM.4: Energy in Chemical Systems

Examines energy transfers in chemical systems, exothermic and endothermic enthalpy changes (\Delta H), potential energy diagrams, activation energy ($E_a$), collision theory, factors influencing reaction rates, role of catalysts, dynamic chemical equilibrium, Le Chatelier's principle, and equilibrium constant expressions ($K_{eq}$).