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The part that I need help with is Quantum Numbers. My book has:

n(principal energy levels)

l(sublevels)

ml(Orbitals)

ms(Electron Spin)

I don't really understand this part, the book explains it very poorly. I understand Electron configuration(1s2s,2p,etc). If someone could help me relate this information, I'd be very grateful. I'm not sure how it all ties together.

Here is an example question(homework) that I don't understand completely.

How many electrons in an atom can have each of the following quantum number designations?

a. n=1, l=0, ml=0

b. n = 5, l=3, ml=+2

c. n=3, l=2

Thank you,

Brad