4) Say you have a monatomic substance simulated with 100 atoms on the computer simulation program. You see that it is in its solid phase and when all KE is removed and the temperature reads 0 K, the total PE of these 100 atoms is -400x1021 J. You therefore know that the bond energy of these 100 atoms is -400x10 21 J. a) The well depth, z, for these atoms is 0.8 x 10-21 J. Determine the average number of nearest-neighbors for each atom (refer to Activity 3.5 or the Particle Model of Bond Energy foldout). b) Why do you think that the average number of nearest-neighbors per atom turns out to be less than 12 for this sample of 100 atoms