Question

What does the p mean in 1s22s22p63s!?

o the p shell
o one of the 4 sub-shells
o always represents the outermost shell

Answer 1

its 1s2 2s2 2p6 3s2 3p6 , it goes in that order.

p represents the p orbital , which can accomodate a maximum of 6 electrons.

Answer 2

one of the 4 sub shells (s,p,d,f)