[" The half life of Radium is "1620" years."],[" (1) And atomic weight "226" gin/mo no of "],[" atoms disintegrated per sec from "1gm],[" of this sample will be "],[[" (1) "3.61times10^(16)," (2) "3.61times10^(17)],[" (3) "3.61times10^(19)," (4) "3.61times10^(18)]]