# How does ionic radius change on the periodic table?

The given picture is one I use a lot, and it certainly does illustrate what we have argued in the former: anions get larger; cations get smaller with respect to radii. Only problem is it quotes units of $\text{pm} \equiv {10}^{-} 12 \cdot m$; a chemist would typically use $\text{Angstroms}$, i.e. $1 \times {10}^{-} 10 \cdot m$........