Question

The half life of radon-222 is 3.824 days. After what time will one fourth of a given amount of radon remain?

Answer 1

Decay process. After 7.648 days, you will see one quarter.

Explanation:

`1-> 0.5 -> 0.25`

From one full unit to one quarter, you need two periods (arrows Show one period or half life). Since half life of radon-222 is 3.824 days, you need twice this time to get one quarter at the end.

`2*3.824=7.648` days.

You require 7.648 days to reach one quarter at the end.