Avogadro constant (Nₐ)

Key term for OCR GCSE Chemistry A, used in Monitoring chemical reactions.

Definition

The number of atoms, molecules, or ions in exactly one mole of a given substance, specifically $6.02 \times 10^{23} \text{ mol}^{-1}$ .

Exam Context

Avogadro constant (Nₐ) appears in OCR GCSE Chemistry A revision content for Monitoring and controlling chemical reactions, especially Monitoring chemical reactions and Standard Form with Avogadro.

Monitoring and controlling chemical reactions Monitoring chemical reactions Standard Form with Avogadro

Study Pathways

Monitoring and controlling chemical reactions

Monitoring chemical reactions

Standard Form with Avogadro

Chemical reactions

Introducing chemical reactions

Mass and Moles Relationship

Found in Revision Notes

Monitoring and controlling chemical reactions

Standard Form with Avogadro

Monitoring chemical reactions • Standard Form with Avogadro

Revise note

Chemical reactions

Mass and Moles Relationship

Introducing chemical reactions • Mass and Moles Relationship

Revise note

Related Key Terms

Amount of substance Atom Avogadro constant Directly proportional

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