Question

Half life period of U234 is 2.5×105 years. In how many years it will remain 25% of original amount?​

Answer 1

Answer:

5x105=525years

Explanation:

As for a half life half of initial amount is reduced therefore

left conc=1/4, as 25% left

n=no of half lives

so 1/2^n=1/4

2^n=2^2

n=2

so 2 half lives

now 2x2.5x105=5x105=525