Half life of `"_92^238U` against `alpha-decay` is `4.5 xx 10^9` years. Calculate activity of 1 g of sample `"_92^238U`.

The half-life of "_92^238U undergoing alpha decay is 4.5 xx 10^9 years. Calculate the activity of 10 g sample of "92^238U .

The half life of "_92^238U undergooing alpha today decay is 4.5 xx 10^9 years . Calculate the activity of 5 g sample of "_92^238U .

The half life of "_92^238U against alpha-decay is 1.5 xx 10^17s . What is the activity of a sample of "_92^238U having 25 xx 10^20 atoms?

Tha half-life of U^(238) against alpha decays is 1.42 xx 10^(17)s .How many disintengrations per second occur in 1 g of U^(238) ?Given,Avogadro umber =6.02 xx 10^(23) mol^(-1) .

The value of decay constant of Co^(60) is 2.5xx 10^(-7)"min"^(-1) . The activity of 2.0 g of the sample is nearly :

The isotope Phosphorus-33 undergoes beta - decay to form Sulphur-33,which is stable.The half - life of Phosphorus-33 is 24.8 days. A pure sample of Phosphorus - 33 has an initial activity of 3.7 xx 10^6 Bq. Calculate the initial number of Phosphorus - 33 nuclei in the sample,