Alkali metal
Alkaline earth
Transition metal
Post-transition metal
Metalloid
Nonmetal
Halogen
Noble gas
Lanthanide
Actinide
Click any element for its configuration, common ions, and molar mass. Masses in parentheses are the mass number of the most stable known isotope (no stable/standard weight exists). Electron configurations beyond period 6 follow the standard Aufbau filling order and may not reflect every experimentally confirmed anomaly for the heaviest, least-studied elements.