How many of the following elements can form compounds with an expanded octet? I H Br As
A) 2
B) 0
C) 3
D) 1
E) 4

Question

Quizplus · Accepted Answer

H cannot form an expanded octet as it can only form 1 covalent bond, which would result in 2 electrons in its valence shell. Br can form an expanded octet as it is in period 4 or higher and has access to the d orbital. As can also form an expanded octet for the same reason. Iodine, which is in the same group as Br, can also form an expanded octet. Therefore, out of the given elements, only As, Br, and I can potentially form compounds with an expanded octet.

How Many of the Following Elements Can Form Compounds with an Expanded