Question

After two half-lives, the amount of radioactive substance remaining will be
A 25% of the initial parent nuclei.
B 75% of the initial parent nuclei.
C 50% of the initial parent nuclei.
D 25% of the daughter nuclei

Answer 1

Answer:

A 25% of the initial parent nuclei.

Explanation:

One half life, you get 50%, two half lives you get 25% and you just keep dividing by 2 from there. :) Good luck my friend!