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A radioactive sample at any instant has its disintegration rate 5000 disintegrations per minute.

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A radioactive sample at any instant has its disintegration rate 5000 disintegrations per minute. After 5 minutes, the rate is 1250 disintegrations per minute. Then, the decay constant (per minute) is

(a) 0.4 ln2 

(b) 0.2 ln2

(c) 0.1 ln2 

(d) 0.8 ln2

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1 Answer

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Best answer

Correct Option (a) 0.4 ln2

Explanation:

where, λ is decay constant per minute,

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