" .The half life of radium is "1600" years.The mean life of radium is "

Half life of radium is 1600 years. Its average life:

The half life of radium is 1600 years. How much time does 1g of radium take to reduce to 0.125 g.

The half life of radium is 1600 years. The number of undecayed atoms of radium after 4800 years will be :

The half life of radium is about 1200 years.if hundred gram of radium is existing now than 25g will remain undecayed after

The half life of radium is about 1200 years.if hundred gram of radium is existing now than 25g will remain undecayed after

The half life of radium is 1600 years. In how many years will one gram of pure radium be reduce to one centigram?

The half-life of radium is 1600 years. After how many years 25% of radium block remains undecayed?