Atomic Structure and Isotopes (OCR A-Level Chemistry A): Flashcards

Number of protons in nucleus

Same element, different neutrons & masses

Protons + neutrons

$A - Z$

$1+$

$\frac{1}{1836}$ (negligible)

Equal protons and electrons

Charged atom, unequal protons & electrons

Positive ion, fewer electrons than protons

Identical (same electron number)