Question

the half life of radioactive element is 30 days in 90
days the percentage of disintegrated part is​

Answer 1

Answer:

Half life of radioactive element is 30 days.

Hence 50% part disintegrate in 30 days and 50% remains.

In 60 days half of remained 50% means 25% disintegrate and 25% remains.

In 90 days half of remained 25% means 12.5% disintegrate and 12.5% remains.

So total of 50 % + 25% + 12.5% = 87.5% Disintegrate.

12.5% remains.