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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. AS Level
  2. /Chemistry
  3. /Formulae and equations

Step-by-step lessons on Edexcel AS Level Chemistry Formulae and equations. Each one builds up to exam-style questions.

Lessons