Balancing Symbol Equations
The Law of Conservation of Mass, reading chemical formulae, counting atoms, and three methods for balancing equations.
Start lesson →
Atomic Structure
Using the periodic table to find subatomic particles, isotopes, electronic structure, and drawing atom diagrams.
Start lesson →
Moles & Avogadro’s Constant
What a mole is, Avogadro’s constant, converting between moles, mass and particles, and using Mr for compounds.
Start lesson →
Ions & Chemical Formulae
Group ions, transition metal ions, molecular ions, and using ion charges to work out chemical formulae.
Start lesson →
Free Radical Substitution
Homolytic and heterolytic bond fission, the three-stage mechanism, and further substitution of alkanes with halogens.
Start lesson →
Hess Cycles
Hess's Law, combustion and formation Hess Cycles, worked examples, and exam memory aids for calculating unknown enthalpy changes.
Start lesson →