The half-life periods of two elements A and B are 5 days and 5 months, respectively. Which of the two is more stable?
A
B
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B
A
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C
Both A and B equally stable
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D
None of these
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Solution
The correct option is A B t1/2=ln(2)λ=τln(2)(whereτisthetotallifeoftheradioactiveelement)Morethet1/2,morebeitstotallife.Hencestabilitywillalsobemoreforradioactiveelementhavingmorehalflife.