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Chemicals

Gold

Description

 

Gold is the most malleable and ductile metal known. It has been a valuable and highly sought-after precious metal for coinage, jewelry, and other arts since long before the beginning of recorded history. Besides its widespread monetary and symbolic functions, gold has many practical uses in dentistry, electronics, and other fields. Some gold salts do have anti-inflammatory properties and are used as pharmaceuticals in the treatment of arthritis and other similar conditions. However, only salts and radioisotopes of gold are of pharmacological value, as elemental gold is inert to all chemicals it encounters inside the body. In modern times, injectable gold has been proven to help to reduce the pain and swelling of rheumatoid arthritis and tuberculosis. Its high malleability, ductility, resistance to corrosion and most other chemical reactions, and conductivity of electricity lead to many uses of gold, including electric wiring, colored glass production and even gold leaf eating. Gold leaf, flake or dust is used on and in some gourmet foods, notably sweets and drinks as decorative ingredient.

Chemical Properties

Appearance Yellow Metal
Atomic Number 79
Atomic Weight 196.966 g/mol
Block d
Boiling Point 2856 °C
CAS Number 7440-57-5
Class NA
Crystal Structure Lattice Face Centered Cubic
Density 19.30 g/cm3
EINECS Number 231-165-9
Electron Configuration 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s2 4d10 5p6 4f145d10 6s1
Group 11
Ionization Energy 890.1 KJ/mol
Melting Point 1064.18 °C
Oxidation State -1,1,2,3,4,5
PG NA
Period 6
RTECS Number MD5420000
Symbol Au
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