Where Is the Expectation Value in a 2p Orbital?

[Radfire]

Homework Statement

Where would the expectation value on a 2p orbital lie? and where would you likely find the electron relative to the maximum?

Homework Equations

found on a forum that the expectation value is n^2 a_0 but id like a more reliable source

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 I am not sure if that's 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 I am 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.

 

[vela]

Expectation value of what — r, x, y, z?

 

[Radfire]

question doesn't say, id guessing it means the average position of an electron so maybe take 2p_x and find <x>