Which is the FALSE statement about C-14?

A.

It is a stable isotope.

B.

It is a radioactive isotope.

C.

It is present in all living things.

D.

It is used to calculate the age of remains.

Answer : The false statement is, (A) It is a stable isotope.

Explanation:

Isotope : It is defined as the element that have the same number of protons but have the different number of neutrons of each of the atom.

Carbon has three isotopes which are carbon-12, carbon-13 and carbon-14.

Carbon-14 is an unstable isotope which is radioactive isotope and it is present in all the living things.

Carbon-14 is used to calculate the age of of remains.

Hence, the false statement is, (A) It is a stable isotope.

The answer is: A

C-14 is not stable and this is the reason why it goes through radioactive decay.