AQA GCSE Chemistry · 8462
Specification 4.3.1.1, 4.3.1.3 · Paper 1
- Revise: Conservation of Mass
A chemical equation containing the same number of atoms of each element on both sides.
- Revise: Mass Changes in Gas Reactions
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GCSE Chemistry · key term
A chemical equation with the same number of atoms of each element on both sides.
Used by AQA, Edexcel and OCR
Specification 4.3.1.1, 4.3.1.3 · Paper 1
A chemical equation containing the same number of atoms of each element on both sides.
Specification 1.48 · Paper 1, Paper 2
An equation with equal numbers of atoms of each element on its two sides.
Revise: Mass Calculations from EquationsA balanced symbol equation therefore contains the same number of atoms of each element on both sides. Its coefficients show fixed proportions between the substances.
Specification CM4.1i · Paper 2 (Foundation), Paper 4 (Higher)
An equation containing chemical formulae in which each element has the same number of atoms on both sides.
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
A symbol equation with the same number of atoms of each element on both sides.
Use the balanced symbol equation to identify any gaseous reactant or product before explaining the direction of the mass change.
Start with a balanced symbol equation; an unbalanced equation gives the wrong mole ratio.
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