12. After 3200 years radium content per 10 dia How many radium atoms will be left in the atoms? Dium Has a half-life of 1600 years.

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

For every 10^6 atoms of radium in a sample today, find the number of atoms that will be left after 3200 years. Assume half-life of radium to be 1600 years.

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

1 mg radium has 2.68 xx 10^(18) atoms. Its half-life is 1620 years. How many radium atoms will disintegrate from 1 mg of pure radium in 3240 years ?

The amount of radium in a radioactive sample is 16 g. What amount of radium will remain in the same after 4800 y if the half-life of radium is 1600 y ?

1 mg redium has 2.68xx10^18 atoms. Its half life is 1620 years. How many radium atoms will disintegrate from 1 mg of pure radium in 3240 years ?

1 mg redium has 2.68xx10^18 atoms. Its half life is 1620 years. How many radium atoms will disintegrate from 1 mg of pure radium in 3240 years ?

Experiments show that radium decomposes at a rate proportioanl to the amount of radium present at the moment. If its half life is 1570 years, what percentage will disappear in one years?