Question

a radioactive isotope having a half life of 3 days was received after 12 days it was found that there were 3 g of isotope in the container. the initial amount of isotope when packed was

36g
48g
12g
24g​

Answer 1

Answer:

12/3=x/3

12×3=3x

36=3x

to find x

x=36/3

x=12

so answer is 12 g