Q.

If 8.0 g of radioactive isotope has a half life of 10 hours, the half life of 2.0 g of the same substance is

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a

2.5 hours

b

5.0 hours

c

10 hours

d

40 hours

answer is C.

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Detailed Solution

Half life is independent of the initial amount of substance.
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If 8.0 g of radioactive isotope has a half life of 10 hours, the half life of 2.0 g of the same substance is