1. The problem statement, all variables and given/known data what is the possible wave functions of a two hydrogen atom system under a pertubation, if one of them was perpared in 2s0 and the other was perpared in 2p0 state. 2. Relevant equations 3. The attempt at a solution I have no idea of the total wave function should be the sum of both individual functions or its the products of both. And the physics meaning behind summation and multipcation of wavefunctions. PS: this is not actually a university home work, but a self study problem, please ignor me if I have posted a wrong place. thanks alot.