Page 27 - Electronic Configuration

 Group 15, 16 and 17 elements accept

electrons to form anions with noble gas

configurations

Example:

2
2
O : 1s 2s 2p 4

O 2 : 1s 2s 2p 6
2
2

(isoelectronic with neon)

2
Cl : 1s 2s 2p 3s 3p 5
6
2
2
6
2
Cl  : 1s 2s 2p 3s 3p 6
2
2
(isoelectronic with Ar)