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A radio active sample contains 600 radio...

A radio active sample contains 600 radio active atoms. Its half life period is 30 minutes. The no. of radio active atoms remaining, if the decay occurs for 90 minutes is

A

300

B

200

C

400

D

75

Text Solution

Verified by Experts

The correct Answer is:
D
`(N )/(N _(0)) = ((1)/(2)) , n = (t)/( T _((1)/(2)))`
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