Au - Gold


Atomic Number: 79
Atomic Weight: 196.9665
Element Type: Transition Metal
Crystal Structure: Cubic Face Centered
Melting Point: 1064.18°C = 1947.524°F = 1337.33 K
Boiling Point: 2856.0°C = 5172.8°F = 3129.15 K
Critical Temp: °C = °F = K
Atomic Radius: 1.79 Å (Å = Angstrom = 10-10 m)
Covalent Radius: 1.34 Å
Electronegativity: 2.4


(Sanskrit Jval; Anglo-Saxon gold; L. aurum, gold) Known and highly valued from earliesttimes, gold is found in nature as the free metal and in tellurides; it is very widelydistributed and is almost always associated with quartz or pyrite.


It occurs in veins and alluvial deposits, and is often separated from rocks and otherminerals by mining and panning operations. About two thirds of the world's gold outputcomes from South Africa, and about two thirds of the total U.S. production comes fromSouth Dakota and Nevada. The metal is recovered from its ores by cyaniding, amalgamating,and smelting processes. Refining is also frequently done by electrolysis. Gold occurs insea water to the extent of 0.1 to 2 mg/ton, depending on the location where the sample istaken. As yet, no method has been found for recovering gold from sea water profitably.

Science Quote

'A hundred times every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving…'

Albert Einstein

All rights reserved. © Copyright '1995-'2018   Privacy Statement | Cookie Policy