1.

The decay constant of a radioactive element is 3 xx 10^(-6) "min"^(-1). Its half-life is

Answer»

`2.31 XX 10^(5)` min
`2.31 xx 10^(6)` min
`2.31 xx 10^(-6)` min
`2.31 xx 10^(-7)` min

Solution :`t_(1//2) = (0.693)/(lamda) = (0.693)/(3 xx 10^(-6) "min"^(-1)) = 2.31 xx 10^(5)` min


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