Skip to content

Course home

Formulae and equations
x

The parts of a chemical equation

The parts of a chemical equation

Labelled balanced equation 2Mg(s) + O₂(g) → 2MgO(s), showing coefficient, subscript, state symbols, reactants, products and matching atom counts

A chemical formula shows which atoms or ions are present, and a chemical equation shows reactants turning into products. A balanced equation has the same number of each type of atom on both sides.

Formulae and equations Lesson

  1. A Level
  2. /Chemistry
  3. /Formulae and equations

Step-by-step lessons covering Edexcel A Level Chemistry Formulae and equations for A Level Chemistry. Each lesson works through exam-style questions in Paper 1, Paper 2 and Paper 3 format. Build confidence with atomic structure, bonding and moles calculations early on, since these underpin the more demanding organic mechanisms, equilibrium and practical-analysis topics that dominate Year 2.