Question

Half life of radioactive substance is 4 days. Amount of the substance decayed in two days is
i) $\frac{1}{\sqrt{2}}$
ii) $1-\frac{1}{\sqrt{2}}$
iii) 20%
iv) $\frac{1}{8}$

Answer 1

After two half lives ¼th ¼th fraction of nuclei will remain undecayed . or ¾th ¾th fraction will decay hence the probability that a nucleus decays in two half lives 3/4

Answer 2

Answer:

Hips. .........

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m..mmnm.m..bnnp aakho 1