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GCSE Chemistry · key term
The principle that atoms are not created or destroyed in a chemical reaction, so the total mass of all reactants equals the total mass of all products.
Used by AQA, Edexcel and OCR
Specification 4.3.1.1 · Paper 1
The principle that no atoms are made or lost during a chemical reaction, so the total mass of all the products equals the total mass of all the reactants.
Specification 1.47 · Paper 1, Paper 2
Revise: Law of Conservation of MassThe law of conservation of mass still applies, but the balance may not be measuring every reactant and product.
Specification C3.1i · Paper 1 (Foundation), Paper 3 (Higher)
The principle that mass is not created or destroyed, so the total mass of all reactants equals the total mass of all products.
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
The rule that the total mass of reactants equals the total mass of products in a chemical reaction.
Revise: Conservation of massThe law of conservation of mass follows from this: the total mass of the reactants equals the total mass of the products. Mass is measured in units such as grams (g). The law applies to the whole reaction, so the totals must include all the substances taking part.
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