Find the following:
<r> for the 2p0
<r2> for the 2p1
Please see the attached file.
2p means n=2 and l=1
n is te principal QN and l is the orbital QN
For n = 1,2, 3 , l can take 0,1,2...(n-1) values
Similarly ml can take -l , 0,- l values. Here is the magnetic orbital QN
For each magnetic QN, there can be 2 spin states +1/2 and -1/2.
So when you say 2p0, the 0 ...
This solutions provides a detailed explanation and breakdown in 264 words of the meaning of 2p, including orbital and principal QN. The solution for r is shown through the use of a radial wave function.