Thành thạo Hóa học từ những nguyên lý cơ bản
Cấu trúc nguyên tử, liên kết, phản ứng, hóa lượng, định luật khí, dung dịch và nhiệt hóa. Chuẩn theo Khung Chương trình Massachusetts cho Hóa học bậc trung học.
Hóa Học — Khái Niệm Cốt Lõi
Xu hướng tuần hoàn, liên kết, lượng pháp, định luật khí và axit-bazơ.
Lab Safety & the Scientific Method
Before you mix anything: master the safety rules and the experimental mindset that every Regents question tests. Hypotheses vs theories, controls, sig figs, and the everyday gear that keeps the lab safe.
Matter: States, Properties, and Why It All Changes
Solid, liquid, gas — and the difference between a physical and chemical change. Mass conservation, mixtures vs pure substances, and the 5 major reaction types every Regents student must recognize on sight.
Reading the Periodic Table: Trends That Predict Everything
The periodic table isn't a list — it's a predictive engine. Groups, periods, blocks, and the four major trends (atomic radius, ionization energy, electronegativity, metallic character) that the Regents leans on heavily.
Atoms: Subatomic Particles & Electron Configuration
Protons, neutrons, electrons — and the rules that govern where electrons live. Isotopes, the Bohr model, modern orbitals, and how to write the configuration of any element you'll see on the Regents.
Chemical Bonding: Ionic, Covalent, and Molecular Shapes
Why do atoms bond at all? Ionic, covalent, and metallic bonding compared — plus Lewis structures, polarity, VSEPR shapes, and the intermolecular forces that make water wet.
The Mole & Stoichiometry: Chemistry's Counting Unit
Avogadro's number is just chemistry's 'dozen' — and stoichiometry is its grocery-list math. Mole conversions, mass-to-mass calculations, limiting reagent, and percent yield with worked examples.
Solutions: Molarity, Dilution, and Colligative Properties
When salt disappears into water, what really happens? Solubility, the math of molarity and dilution, the like-dissolves-like rule, and how dissolved solute changes the boiling and freezing points.
Gas Laws & the Kinetic Molecular Theory
Boyle, Charles, Gay-Lussac, and the ideal gas law — plus the kinetic molecular theory that explains WHY gases behave the way they do.
Thermochemistry: Heat in Reactions
Why some reactions burn hot while others get cold. Endothermic vs exothermic, ΔH sign conventions, specific heat calculations, calorimetry, and phase-change energies.
Nuclear Chemistry: Decay, Fission, and Fusion
Alpha, beta, gamma — the three classic decay types. Half-life problems, balancing nuclear equations, and the difference between fission (splitting heavy nuclei) and fusion (combining light nuclei). Plus how radioisotopes serve medicine and dating.