The decay constant for a radio nuclide, has a value of `1.386 day^(-1)`. After how much time will a given sample of this nuclide get reduced to only 6.25% of its present number ?

The half life of a given radioactive nuclide is 138.6 days. What is the mean life of this nuclide? After how much time will a given sample of this nuclide get reduced to only 12.5% of its initial value?

A radioactive isotope has a half-life of T years. After how much time is its activity reduced to 6.25% of its original activity ? Given T _(1//2)=T

The decay constant for a given radioactive sample is 0.3465 day^-1 . What percentage of this sample will get decayed in a period of 4 days?

The decay constant , for a given radioactive sample, is 0.3465 "day"^(-1) .What percentage of this sample will get decayed in a period of 4 days ?

The decay constant , for a given radioactive sample, is 0.3465 "day"^(-1) .What percentage of this sample will get decayed in a period of 4 days ?

The half life period of a radioactive substance is 140 days. After how much time, 15 g will decay from a 16 g sample of the substance?