chemistry
posted by jerson .
Write both the complete electronconfiguration notation and the noblegas notation for each of the elements below
a. Na
b. Sr
c. P

You should know how to do this. If you have trouble. here is a site that may help. If you don't understand, post again but tell us what you don't understand.
www.webelements.com 
Na: 1s^2, 2s^2, 2p^6, 3s^1 or,
Na: [Ne] 3s^1
Sr: 1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 4s^2, 3d^10, 4p^6, 5s^2 or,
Sr: [Kr] 5s^2
P: 1s^2, 2s^2, 2p^6, 3s^2, 3p^3 or,
P: [Ne] 3s^2, 3p^3 
thanks GK

1s22s22p1

Na: 1s^2, 2s^2, 2p^6, 3s^1 or,
Na: [Ne] 3s^1
Sr: 1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 4s^2, 3d^10, 4p^6, 5s^2 or,
Sr: [Kr] 5s^2
P: 1s^2, 2s^2, 2p^6, 3s^2, 3p^3 or,
P: [Ne] 3s^2, 3p^3