Question

The half life of a particular radioactive substance is 1 year. If yiu started with 50 grams of this substance, how much of it would remain after 3 years.

Answer 1

Remaining amount is 6.25 grams

Explanation:

I had the same question not to long ago

one year what you would be left with is 50/2 which is 25 gram

second year, you would be left with 50/4 which is 12.5

third year what's left is 50/8 i.e 6.25