Arnold Benn

This periodic table represents electronegativity values as rainbow color-coded, from most metallic (red) to most non-metallic (violet). It also represents the sizes of the atoms based upon experimental covalent atomic radius data (obtained on wikipedia).

This periodic table represents ionic sizes, based upon data from the crystal state. It is color-coded to show positive ions in dark red and negative ions in dark violet. As shown, some elements can make ions with different charges. (Not all elements are represented.)

A simple graphical representation of the solubility rules in chemistry. Blue represents solubility and red represents insolubility.