Atomic & Mass Number (OCR GCSE Physics A (Gateway Science Suite)): Flashcards

Number of protons in an atom

Same number of protons

Equal numbers

Number of protons + number of neutrons

Atoms of same element with different numbers of neutrons

Different mass numbers, same atomic number

$\text{mass number} - \text{atomic number}$

Process where atoms lose or gain electrons

Atoms that have lost or gained electrons

Atoms lose electrons

Atoms gain electrons