Gallium [Ga] (CAS-ID: 7440-55-3) locate me
An: 31 N: 39 Am: 69.723
Group No: 13 Group Name: (none)
Block: p-block Period: 4
State: solid at 298 K (but melts only slightly above this temperature)
Colour: silvery white Classification: Metallic
Boiling Point: 2477K (2204'C)
Melting Point: 302.9146K (29.7646'C)
Density: 5.91g/cm3
Shell Structure diagrams | Atomic Radius diagram
Isotopes

Discovery Information
Who: Paul emile Lecoq de Boisbaudran
When: 1875
Where: France
Name Origin
Paul named the element after his native land of France and, in a multilingual pun, after himself, as 'Lecoq' = the rooster, and Latin for rooster is "gallus".
Sources
Found throughout the crust in minerals like bauxite, germanite and coal, but does not exist in pure form in nature.
Uses
Used in semiconductor production, quartz thermometers, laser diodes, used to locate tumors and for creating mirrors. Gallium Gadolinium Garnet (Gd3Ga5O12) is a material with good optical properties, and is used in fabrication of various optical components and as substrate material for magneto-optical films. It has been suggested that a liquid gallium-tin alloy could be used to cool computer chips in place of water. As it conducts heat approximately 65 times better than water it makes a considerably better coolant.
Notes
Gallium, along with caesium and mercury, is one of the few metals that are liquid at (or near) room temperature.
Some sources suggest that it may cause dermatitis from prolonged exposure; other tests have not caused a positive reaction. It will however stain your skin if you hold it in your bare hands.
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