Question

The decay of which radioisotope can be used to estimate the age of the fossilized remains of an insect?

(1) Rn-222 (3) Co-60
(2) I-131 (4) C-14

Answer 1

(4) C-14 Carbon is found in all living organisms.

Answer 2

C-14

Step-by-step explanation:

Carbon-14 is a naturally occurring isotope of carbon.

It is present in all living organism.

When a living organism dies or fossilized, the radioactive carbon-14 undergoes disintegration.

If we can measure the amount of Carbon-14 left in a fossil we can determine the age of the dead organism.

This is known as carbon dating.