Hello mates. I was doing some research about Rydberg atoms, and I came up with this question: what's the energy of an electron in n energy level in an atom which is NOT hydrogen-like, that is, an atom with more than 1 electron? How can we calculate it? What if the electron we are studying is in a much higher energy level (Rydberg energy level) and the others are in the lowest posible? What if we have an excited electron apart of the one we are studying? Thank you in advance.