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Upon irradiating californium with neutrons , a scientist discovered a new nuclide having mass number of 250 and a half-life of 30 min . 90 min after the irradiation, the observed radioactivity due to nuclide was 100 dis/min . If 3.46 xx 10^(x) atoms of the nucleide were present initially . Then x is .......... |
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Answer» `A = lambda N , 800 = (0.693)/(30 ) xx N_(t)` ,where `N_(t) = (800 xx 30)/(0.693) = 3.46 xx 10^(4)` ATOMS |
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