A radioactive isotope has a half life of T years : How long will it take the activity to reduce to
3.125%

A radioactive isotope has a half life of T years : How long will it take the activity to reduce to 1%of its original value?

If 2.0 g of a radioactive isotope has a half life of 20 hr, the half life of 0.5 g of the same substance is

Half life .^87Ga is 78 h.How long will it take to decay 21% of sample of Ga?

The half life a first order reaction is1.7hr.How long will it take for 20% of the reactant to react?

An electron travelling with a speed of 5x 10^3 m/s passes through an electric field with an acceleration of 10^12 m/s^2 . How long will it take for electron to double its speed?

An electron travelling with a speed of 5 xx 10^3 m/s passes through an electric field with an acceleration of 10^12 ms^-2 . How long will it take for electron to double its speed?

A first order reaction has a specific rate constant of 10^(-2) sec^(-1) . How much time will it take for 20g of the reactant to reduce to 5g ?