1.

Disintegration constant for a radioactive substance is 0.58 hr^(-1). If half-life period

Answer»

8.2 HR
5.2 hr
1.2 hr
2.4 hr

Solution :`K = (0.673)/(t_(1//2)) RARR t_(1//2) = (0.693)/(k) = (0.693)/(0.58) = 1.2 hr`


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