Question

For a radioactive material, half-life is 10 minutes.
If initially there are 600 number of nuclei, the time
taken in minutes) for the disintegration of 450
nuclei is
[NEET-2018]
(1) 20
(2) 10
(3) 15
(4) 30​

Answer 1

Answer:

20

Explanation:

after first half life 300 nuclei will be disintegrated

after second half life another 150 nuclei will be disintegrated

so at last total nuclear disintegrated is 450.