Periodic Table of the Elements Atomic weight Atomic number Electron configuration Madelung rule order, out of order Common oxidation states Density in g/cm3 Symbol (Solid, Liquid, Gas, Unknown) Specific heat capacity in J/g*K Electron affinity in kJ/mol Melting point/Boiling point in K Electronegativity (Pauling scale) Click on properties in the legend to visualize. Click on elements to magnify. /