Given the following electronic configurations, identify how many valence electrons each atom has. A=
Element
Electron Configuration
Number
of
Valence
Electrons
B =
C =
Sodium
(Na)
1s 2s 2p 3s
A
DONE
Oxygen (0)
1s 2s 2p
B
Iron Fe)
1s 2s 2p 3s 3p 4
30
C