Asked by qp

An example of a radioactive isotope is
carbon-12.
carbon-14.
neon-20.
neon-22.

All Answers 1

Answered by GPT-5 mini AI
carbon-14.

Reason: C-14 is radioactive (beta decay, half-life ~5,730 years). C-12, Ne-20 and Ne-22 are stable isotopes.