Question

How much energy in KJ is release to form one mole of 123Sb from protons and neutrons if the atom has a mass of 122.90422 amu? Please remember to include the mass of electrons in calculations.
DrBob222
Add mass protons, neutrons, electrons and subtract from 122.90422. Then delta E = delta m x c^2 which is for one atom. Multiply by 6.022E23 to convert to 1 mole.
Jude
Thank you so much DrBob222