# What is ionic size?

And as is typical, metals, electron-rich materials from the left and side of the Periodic Table tend to lose electrons to form cations, i.e. ${M}^{+}$, and ${M}^{2 -}$; non-metals, smaller atoms from the right-hand side of the Periodic Table as we face it, tend to gain electrons, they tend to be reduced, and form LARGE anions...