Find the activity of 1 gm of radium `(._(88)Ra^(226))`Whose half life is 1620 years.

Calculate the activity of one gm sample of ._(38)^(90)Sr whose half life period is 28.8 years.

The atomic mass number of Radium is A=226 , its half life is 1622 years. What is the activity of 1g Radium ?

The atomic mass number of Radium is A=226 , its half life is 1622 years. What is the activity of 1g Radium ?

Show that the mass of radium (""_(88)^(226)Ra) with an activity of 1 curie is almost a gram. Given T_(1//2) = 1600 years.