Definitions (Metals)
METALS
Metal: The electro-positive elements that are good conductors of
heat and electricity and are lustrous, malleable and ductile in nature.
Alloy: a homogenous mixture of metal with other metal and
non-metals.
Aqua-regia: The mixture of hydrochloric acid and nitric acid
in the ratio of 3:1 is called aqua-regia.
Gangue: The undesirable substance associated with metal is known
as gangue.
Slag: Certain substances which when placed in a furnace and heated
combine with the gangue to form an easily fusible material.
Mineral: The naturally occurring compounds of metal in
the earth’s crust.
Ores: The minerals from which metal can be extracted
economically, profitably and conveniently is called ores of that metal.
Metallurgy: The complex and sequential process of extracting
metals from their respective ores.
Rusting: The process of slow conversion of metal into
their undesirable compounds by reaction with the moisture and other gases
present in the atmosphere.
Blister copper: The molten form of copper that gives out
impurities of gases in the forms of bubbles.
Coinage metal: Elements of group IB collectively called
coinage metals since they are used for making coins.
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