Find the energy liberated in the reaction
223Ra → 209Pb + 14C.
The atomic masses needed are as follows.
223Ra 209Pb 14C
223.018 u 208.981 u 14.003 u
MPb = mass of Pb209=208.981 u
MC = mass of C14 =14.003 u
MRa = mass of Ra223=223.018 u
The energy released is 31.671 MeV