1.

The half-life of radium (226) is 1620 years. The time taken to convert 10 grams of radium to 1.25 grams isA. 810 yearsB. 1620 yearsC. 3240 yearsD. 4860 years

Answer» Correct Answer - D
`t = (2.303 xx t_(1//2))/(0.693) "log" (N_(0))/(N)`


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