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

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 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 :

In the nucleus of _(92) U^(238) , two porotns at a distance of 6xx10^-1 m . Calculate their electrostatic potential energy.

Strontium-90 is a radioactive isotope having a half-life of 28 years.Strontium-90 has a denstiy f 2.5 g cm^(-3) .A smaple of Strontium-90 has an activity of 6.4 xx 10^9 Bq .Calculate the volume of the sample.

Strontium-90 is a radioactive isotope having a half-life of 28 years.Strontium-90 has a denstiy f 2.5 g cm^(-3) .A smaple of Strontium-90 has an activity of 6.4 xx 10^9 Bq .Calculate the mass of stronitium 90 in the sample