Portal:Chemistry/Elements/Periodic Table/Key

Chemical series of the periodic table (book)

Alkali metals	Alkaline earth metals	Lanthanides	Actinides	Transition metals
Poor metals	Metalloids	Nonmetals	Halogens	Noble gases

State of matter at STP and natural occurrence.

Primordial	Trace radioisotopes
Solids	Liquids	Gases