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gallium
[ gal-ee-uhm ]
noun
, Chemistry.
- a rare, steel-gray, trivalent metallic element used in high-temperature thermometers because of its high boiling point (1983°C) and low melting point (30°C). : Ga; : 69.72; : 31; : 5.91 at 20°C.
gallium
/ ˈɡælɪəm /
noun
- a silvery metallic element that is liquid for a wide temperature range. It occurs in trace amounts in some ores and is used in high-temperature thermometers and low-melting alloys. Gallium arsenide is a semiconductor. Symbol: Ga; atomic no: 31; atomic wt: 69.723; valency: 2 or 3; relative density: 5.904; melting pt: 29.77°C; boiling pt: 2205°C
gallium
/ găl′ē-əm /
- A rare, silvery metallic element that is found as a trace element in coal, in bauxite, and in several minerals. It is liquid near room temperature and expands when it solidifies. It is used in thermometers and semiconductors. Atomic number 31; atomic weight 69.72; melting point 29.78°C; boiling point 2,403°C; specific gravity 5.907; valence 2, 3.
- See Periodic Table
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Word History and Origins
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Word History and Origins
Origin of gallium1
C19: from New Latin, from Latin gallus cock, translation of French coq in the name of its discoverer, Lecoq de Boisbaudran, 19th-century French chemist
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Example Sentences
In 1875 Lecoq de Boisbandram discovered gallium, which filled one of the gaps; scandium and germanium filled the other two later.
From Project Gutenberg
The Pierrefitte blende contains one part of gallium in four hundred thousand.
From Project Gutenberg
A sulphate and a chloride of gallium have already been obtained.
From Project Gutenberg
The new element was named gallium in honour of France, the discoverers native country.
From Project Gutenberg
Gallium resembles lead in appearance, but is less blue in colour.
From Project Gutenberg
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