Gallium is a soft metal that melts just above room temperature and forms semiconductors used in fast and light-emitting devices.
Atomic number
31
Category
Post-transition metal
Period
4
Group
13
State
Solid
Fun facts about Gallium
It can melt in a warm hand, although it should not be treated as a toy.
Gallium arsenide efficiently emits and detects light.
Gallium expands when it freezes.
Common uses of Gallium
LEDs and laser diodes
High-frequency semiconductors
Special low-melting alloys
Where Gallium sits in the periodic table
Gallium is classified as a post-transition metal in period 4 and group 13 of the periodic table. Under the conditions represented in this reference, its state is solid.
Quick chemistry revision
For quick revision, pair the symbol Ga with atomic number 31 and the listed atomic mass 69.723. The summary, facts, and uses above keep those element properties together in one reference.