An expanded octet may occur:
A)in the 1st and 2nd period only
B)in families IA,IIA,and IIIA only
C)anywhere except period 1 and 2
D)in all families except IA
E)in the 3rd and 4th period only

Question

Quizplus · Accepted Answer

An expanded octet may occur anywhere except the first and second periods because elements in those periods do not have d orbitals available for bonding. Elements in the third and higher periods have d orbitals available, allowing them to use expanded octets.

An Expanded Octet May Occur