The decay constant of `Ra^(226)` is `1.37xx10^(-11)s^(-1)`. A sample of `Ra^(226)` having an activity of `1.5` millicurie will contain

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 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 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 :

They decay constant of radioactive element is 1.5xx10^(9)s^(-1) Its mens-life (in second) will be

The decay constant for an alpha- decay of Th^(232) is 1.58xx10^(-10)s^(-1) . How many alpha- decays occur from 1 g sample in 365 days ?

The decay constant for the radioactive nuclide 64Cu is 1.516 xx 10^(-5) s^(-1) . Find the activity of a sample containing 1mug of ^64Cu . Atomic weight of copper = 63.5 g mole^(-1) . Neglect the mass difference between the given radioisotope and normal coper.