Question

A radioactive isotope of silver has half life of 20 minutes. What fraction of the original mass would remain aftrr ine hour

Answer 1

We know, 1hour=60 minutes.

Also, half life of a substance refers to the amt of time it takes for half of the amt. of the substance to decompose.

=> t=20 minutes 50% of Ag remains

=> t=40 minutes 25% of Ag remains

=> t=60 minutes 12.5% of Ag remains

Ans-0.125