Template:Periodic tables key

Metals						Metalloids	Nonmetals			Unknown chemical properties
Alkali metals	Alkaline earth metals	Inner transition metals		Transition metals	Post-transition metals		Other nonmetals	Halogens	Noble gases
		Lanthanides	Actinides

**Color of the atomic number** shows **state of matter**
black=Solid	green=Liquid	red=Gas	grey=Unknown
(at standard conditions: 0 °C and 1 atm):

**Border** shows **natural occurrence**:
Primordial	From decay	Synthetic