half life of radium is 1580 years. Its average life will be

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

If half life period of radium is 1600 years, its average life period will be:

Half life of radium is 1580 years. It remains 1/16 after the…..

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

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