31
Gallium
Atomic Number31
Atomic Mass69.723 u
CategoryPost-Transition
State at Room TempSolid
Year Discovered1875
About Gallium
Melts at just 29.8C, it will melt in your hand. Used in semiconductors as gallium arsenide for high-speed electronics. The spoof that spoon manufacturers feared gallium spoons because they melt in hot tea. Named after Gaul, the Latin name for France. Used in LEDs, solar panels, and smartphones. Expands when it freezes like water.
More Post-Transitions
13
Aluminum
The most abundant metal in Earths crust. Was once more valuable than gold. Napol...
49
Indium
Named for its indigo blue spectral line. Indium tin oxide is the transparent con...
50
Tin
Used since the Bronze Age to make bronze with copper. Tin cans were invented in ...
82
Lead
One of the earliest metals smelted by humans. Dense, soft, and easy to work with...