The half life of `Ra` is 1600 years. The fraction of a sample of `Ra` that would remain after 6400 years is

The half-life period of radium is 1600 years. The fraction of a sample of radium that would remain after 6400 years is.

The half-life period of radium is 1600 years. The fraction of a sample of radium that would remain after 6400 years is.

Half-life of Radium is 1600 years. Fraction of a sample of radium that is present after 4800 years is

The half-life of redioactive element is 600 yr. The fraction of sample that would remain after 3000 yr is

The half-life of redioactive element is 600 yr. The fraction of sample that would remain after 3000 yr is

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

A radioactive substance has a half-life of 1 year. The fraction of this material, that would remain after 5 years will be.