Write an expression for the expectation value of the energy associated with the Coulomb interaction between the two electrons of a helium atom in its ground state. Use a space eigenfunction for the system composed of products of one-electron atom eigenfunctions, each of which describes an electron moving independently about the Z = 2 nucleus. Do not bother to evaluate the expectation value integral, but instead comment on its relation to the energy levels shown in the Figure below. 0 -50 1,1=0; n=2,11 Singlet -Triplet -60 -Singlet (n=1,1 = 0; n = 2,1=0 Triplet -70 n=1;n=2 n=1,1=0; n = 1,1=0 -80 -Singlet Energy (eV)