Quantum Numbers (Chemistry)?

Question

I have Chemistry HW and I'm not sure how to start it. Can anyone please help me? THANKS ;))

Write the sets of Quantum numbers for all the e- of a ground state Na atom

Answer 1

in the shell K, 2 electrons so 1s2

in the shell L, 8 electrons 2s2 2p6

in the shell m 1 electron 3s    (you do not write 3s1 when you have only one elctron)

Hence 1s2 2s2 2p6 3s