Question

Which ions of oxygen, sulfur, and phosphorus are isoelectronic with the Noble Gases?

Answer 1

So we want to examine Noble gases that are isoelectronic with the IONS of `S`, `P`, and `N`?

Explanation:

Sulfur form a `S^(2-)` ion....i.e. 18 electrons, and this is isoelectronic with neutral argon, i.e. `Ar`....

And phosphorus forms a `P^(3-)` ion....i.e. 18 electrons, and this is isoelectronic with neutral argon, i.e. `Ar`....

And nitrogen forms a `N^(3-)` ion....i.e. 10 electrons, and this is isoelectronic with neutral neon, i.e. `Ne`....