Year: 2020 October
Topic: Nuclei
Time :
1. The half-life of a radioactive sample under going \(\alpha\) -decay is 1.4 x 10
17
s. If the number of nuclei in the sample is 2.0 x 10
21
. The activity of the sample is nearly
(1). 10
4
Bq
(2). 10
5
Bq
(3). 10
6
Bq
(4). 10
3
Bq