THE STABILITY OF ISOTOPES

1 mark · Normal

Which statement best describes a stable isotope?

Show answer

Correct option: It has a balanced number of protons and neutrons.

Common mistakes: Confusing electrons with nuclear stability; Thinking stability is linked to no neutrons

Show mark scheme and worked solution

Marking points

B1 · 1 mark · Correct option selected.

Worked solution

A stable isotope has a balanced number of protons and neutrons, which keeps the nucleus stable.