# Do nonmetals tend to form positive or negative ions?

Non-metals tend to form anions........Because the non-metal comes from the right hand side of the Periodic Table as we face it, its nuclear charge is very poorly shielded by its INCOMPLETE valence electronic shell, and this results in the well-known contraction of atomic radii across the Table from left to right. Halogen and chalcogen atoms thus typically form ${X}^{-}$, and ${E}^{2 -}$ ions.