1. The problem statement, all variables and given/known data Consider an isolated (fixed total energy) system of N atoms each of which may exist in three states of energies: −e, 0, e. Let us specify the macrostates of the system by N, E (the total energy), and n (the number of atoms in the zero energy state). a) Identify explicitly and write out the microstates corresponding to the N = 3, E = 0, n = 1 and N = 3, E = 0, n =3 macrostates (use −, 0, + to denote the state of the atoms). 2. Relevant equations E=ne 3. The attempt at a solution I'm not sure exactly how to write the microstate but I understand what it is. I was thinking along the lines of the statistical weight Omega where: Omega=Omega(N,E,n) And then saying Omega(n) = N!/(n!(N-n)!), and then subbing in the N and n values given. But E isn't taken into account here so I'm confused a tad. Any help would be much appreciated.