Question

Which best describes a radioactive isotope?

An atom is unstable.
An atom is stable.
There is only one other isotope.
There are many isotopes.

Answer 1

The answer is A an atom is unstable

Step-by-step explanation:

I ttok this question on a test and got it right.

Answer 2

Hello,

The answer should be option A "An atom is unstable".

Reason:

A radioactive isotope is a atom thats nucleus is unstable therefore the answer is option A.

If you need anymore help feel free to ask me!

Hope this helps!

~Nonportrit