Question

Radioactive isotopes of an atom are

a/ more stable
b/ less stable
c/ more abundant
d/ more scarce

Answer 1

less stable should be the answer.as I think
I hope this helps you

Answer 2

Answer:b/ less stable

Step-by-step explanation:

Many elements that have one or more isotopes which are radioactive in nature have the nucleus which remains in an unstable state. The unstable nucleus breaks down, decay and emit the radiation. The nucleus in the atoms of these elements are unstable because it consists of unstable ratio of protons to neutron.