The binding energy per nucleon for magnesium-27 is
1.326*10-12 J/nucleon
neucleons = protons + neutrons
                 Â
= 12 + 15 = 27
Binding energy in J = 1.326*10-12 *27Â Â =
3.58*10-11 J
  E = mC2
3.58*10-11Â Â =,
m*(3*108)2
m               Â
= 3.58*10-11/9*1016
                  Â
= 3.97*10-28
Kg                      Â
                  Â
= 3.97*10-28 *6.022*1026 amu
                                  Â
(1 kg = 6.022*1026 amu)Â Â
                    Â
= 0.2390734amu
mass diffect = 0.239074amu
actual mass -theoreticl mass = mass diffect
(12*1.007825 + 15*1.008665 )-theoretical mass = 0.2390734
27.223875-theoretical mass = 0.2390734
-Theoretical mass   = 0.2390734 -27.223875
   Theretical mass of Mg
        = 26.9848amu
>>>>> answer
