1. The problem statement, all variables and given/known data Where would the expectation value on a 2p orbital lie??? and where would you likely find the electron relative to the maximum? 2. Relevant equations found on a forum that the expectation value is n^2 a_0 but id like a more reliable source 3. The attempt at a solution have an exam in morning and its just something which would be nice to know before i walk out the door. using the formula gives an idea but im not sure if thats even a proper formula. if i was to guess id say under the maximum of the "fat" part of the orbital since its an average value. and for the second part im guessing that to would be where the orbital is thickest, even though i know an orbital is an area of probability so technically it could be everywhere at once in the orbital.