1.

The half-life period t_(1//2) of a radioactive element is N years. The period of its complete decays is

Answer»

`N^(2)` YEARS
2N years
`(1)/(2)N^(2)` years
INFINITY

Solution :The `t_(1//2)` of a radioactive element = N years
`:.` The period of its complete decay is infinity


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