Question

Which of the following elements can have an expanded octet when they form covalent compounds with other elements?

Answer 1

(B) sulfur and phosphorus!!!

Answer 2

Answer:

B.

Explanation:

Some of the  elements of the third-period and periods below can have expanded octet because they have d- sub-level.

We have 2 possible answers. A and B. Because  lodine and chlorine. Sulfur and phosphorous are  in the 3d or lower periods.

In the compound P2S5, where P forms 5 bonds.

Iodine and chlorine do not have enough difference in electronegativity to form compound ICl7.

So, the answer is B.