Question

If 100g of an isotope undergoes two half-lives, how many grams will be remaining?

A. 10g
B. 50g
C. 25g
D. 12.5g

Answer 1

C. 25 grams

Step-by-step explanation:

100g l 0 half-lives

50g l 1 half-life

25g l 2 half-lives