Question

Calculate the binding energy per nucleon (in J) for 6Li and 7Li. The atomic masses are 6.015122 u for 6Li, and 7.016004 u for 7Li. (Enter unrounded values. Assume that the mass of 11H = 1.007825 u, mp = 1.007275 u, mn = 1.008666 u, and me = 0.000549 u, respectively.)

Answer 1

Li has 3p, 3e, and 3n. Sum those masses and subtract 6.015122 u . That difference gives you the loss in mass. Then dE = delta m*c^2. For delta m, convert u difference into kg. Post your work if you get stuck.