How many double bonds are present in the "best" resonance structure of the phosphate ion?
A) 2
B) 3
C) 1
D) 0

Question

Quizplus · Accepted Answer

In the "best" resonance structure of the phosphate ion, there are no double bonds present. The phosphate ion has a tetrahedral arrangement around the central phosphorus atom, with three single bonds and one double bond to oxygen atoms. The double bond moves around in resonance structures, but in the "best" structure, it is not present. Therefore the answer is (C) 0.

How Many Double Bonds Are Present in the "Best" Resonance