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Question: In a sample of radioactive material, what fraction of the initial number of active nuclei will remai...

In a sample of radioactive material, what fraction of the initial number of active nuclei will remain undisintegrated after half of a half-life of the sample –

A

14\frac{1}{4}

B

122\frac{1}{2\sqrt{2}}

C

12\frac{1}{\sqrt{2}}

D

222\sqrt{2}

Answer

12\frac{1}{\sqrt{2}}

Explanation

Solution

n = 1/2, A.P = = 12\frac { 1 } { \sqrt { 2 } }