Chemistry (Year 12)
Atomic Structure
What is the electron configuration of a Chlorine (Cl) atom?
1s2 2s2 2p6 3s2 3p5
1s2 2s2 2p6 3s2 3p4
1s2 2s2 2p6 3s2 3p6
1s2 2s2 2p6 3s2 3p3