Loading…
Loading…
GCSE Combined Science · key term
A representation using chemical symbols and numbers to show which elements a substance contains and the relative numbers of their atoms.
Used by AQA and Edexcel
Specification 5.1.1.1 · Paper 3
Revise: Atoms, Elements, Compounds and Chemical FormulaeA chemical formula uses element symbols to show which elements are present and the relative numbers of their atoms. A small number written below and to the right of a symbol is called a subscript. It gives the number of atoms of that element.
Specification Formulae, equations and hazards · Paper 3, Paper 4
A representation of a substance using element symbols and subscripts to show its composition. For an ionic compound, it shows the simplest whole-number ratio of its ions.
Create a free account to read GCSE Combined Science revision notes for your exam board and track your progress.