Periodic Table of the Elements Click on properties in the legend to visualize. Click on elements to magnify. 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) /