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

A 25% of the initial parent nuclei.

Step-by-step 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!