In `._88Ra^(226)` nucleus, there are.

In ""._(88)Ra^(226) nucleus there are

In ""._(88)Ra^(226) nucleus there are

The ._(88)^(226)Ra nucleus undergoes alpha -decay to ._(86)^(222)Rn . Calculate the amount of energy liberated in this decay. Take the mass of ._(88)^(226)Ra to be 226.025 402 u , that of ._(88)^(226)Rn to be 222.017 571 u , and that of ._(2)^(4)He to be 4.002 602 u .

""_88Ra^(226) experiences three alpha -decay . Find the number of neutrons in the daughter element.