Now for an anion. Remember anions are negatively charged ions. We become anions when we accept electrons. We're going to say with an anion you add an electron or electrons to the orbitals with available space.
Now note for an anion, the nonmetal keeps its base name but has its ending changed to eyed. So if we hear oxide, fluoride, chloride, that means we're dealing with the anion form of that element. So keep that in mind when asked to find the electron configurations of anions.