Question

Which of the following is always true about radioisotopes?

A) They have unstable nuclei.

B) Their neutron-to-proton ratio is 1:1.

C)Their decay products are stable isotopes.

D) all of the above
 The answer is A , I just passed my test.

Answer 1

they have an unstable nuclei

Answer 2

A) They have unstable nuclei.

Isotopes are atoms with the same atomic number but different mass number.