Q.

If 2 g of an isotope has a half-life of 7 days, the half life of 1 g sample is

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a

3.5 day

b

7 days

c

14 days

d

28 days

answer is B.

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Detailed Solution

Half life does not depend upon the initial concentration of substance.
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If 2 g of an isotope has a half-life of 7 days, the half life of 1 g sample is