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Mass Number (A) — OCR Chemistry A Definition | GradeGen.AI

Courses
Chemistry A
Key Terms
Mass Number (A)

GCSEOCRJ248

Mass Number (A)

Key term for OCR GCSE Chemistry A, used in Atomic structure.

Definition

The total combined number of protons and neutrons in the nucleus of an atom.

Exam Context

Mass Number (A) appears in OCR GCSE Chemistry A revision content for Particles, especially Atomic structure and Subatomic Particles.

Particles Atomic structure Subatomic Particles

Found in Revision Notes

Particles

Subatomic Particles

Atomic structure • Subatomic Particles

Related Key Terms

Atomic Number (Z)Electrons Ion Isotopes

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