One gram of radium is reduced by `2` miligram in `5` yers by `alpha`-decay. Calculate the half-life of radium.

One gram of radium is reduced by 2 milligram in 5 years by alpha - decay. Calculate the half-life of radium.

One gram radium is reduced by 2 milligram in 5 years by alpha -decay. Calculate the half period of radium.

A certain mass of radium is reduced by 70% in 2780 years. The decay constant is

What is meant by the statement that the half-life of radium is 1622 years ?

The activity of 1 g radium is found to be 0.5. Calculate the half-life period of radium and the time required for the decay of 2 g of radium to give 0.25 g of radium (atomic mass off radium = 226).

The activity of 1 g radium is found to be 0.5. Calculate the half-life period of radium and the time required for the decay of 2 g of radium to give 0.25 g of radium (atomic mass off radium = 226).

The atomic weiht of radium is 226 .It is observed that 3.67 xx 10^(10) alpha - particles are emitted per second from one gramp of radium.Calculate in years the half-life period of radium.

In how many years 1 g of pure radium will be reduced to 1 milligram? The half-life of radium is 1,500 years.