Question

the half life of radium is 1600 years the number of undecayed atoms of radium afer 4800 years is

Answer 1

In case we consider the organization of radium is 100 then it experience be 4800/1600 = 3 half lives henceforth 100/2 = 50/2 = 25/2 = 12.5 will be the sythesis of radium following 4800 years.

Beyond any doubt it will be exceptionally viable which is maximum radium when it is 100.