Question

The half-life of a radioactive kind of iodine is 12 hours. How much will be left after 24 hours,

if you start with 96 grams of it?

Answer 1

Explanation:

Half life means the period after which the material will have only 50% of it left, as if by magic.

Half life is given as 12 hours, so 24 hours is twice half-life.

If we start with 96 grams, after 12 hours, there will be 48 grams left.

After another 12 hours, (total of 24 hours), only half is left, namely 24 grams.