How many valence electrons are in the polyatomic ion HPO4 -2?

Answer 1

Hydrogen has 1 valence electron, phosphorus has 5 valence electrons, and oxygen has 6 valence electrons. So, if you totaled all of the valence electrons in the ion HPO42- you'd get 1 + 5 + 6 X 4 + 2 = 32. However, you should realize that the term "valence electron" really only applies to individual atoms, not compounds. The only electrons one would concern themselves with in the HPO42- ion are the 2 that make it an ion.

Answer 2

There are 32 valence electrons in the polyatomic ion HPO4^2-. This can be determined by adding the valence electrons from each atom in the ion and considering the charge of the ion.

Answer 3

32