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The half life of polonium is 140 days. In what timewill 15 g of polonium be disintegrated out of its initial mass of 16 g ? |
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Answer» 230 days As `m/m_0=(1/2)^N` or `1/16=(1/2)^4=(1/2)^n` `rArr` n=4 Time taken to disintegrate = `T_(1//2)xxn = 140 xx 4` =560 days |
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