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A chemical compound used in preparing derivatives of fatty acids to analyse them on gas chromatograph - mass spectrometer.
Yellow chemical element found in volcanos and natural gas. In industry sulfur is used to produce sulfuric acid, rubber, explosives and pharmaceutics.
Light metal used in aviation industry.
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Highly active alkaline metal used in photovoltaic cells.
Pertaining to the chemical group olefins, any non-aromatic unsaturated hydrocarbon containing one or more pairs of carbon atoms linked by a double bond.
Opposite: aromatic
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Name: vanadium
Symbol: V
Atomic number: 23
Atomic weight: 50.9415 (1)
Group in periodic table: 5
Group name:
Period in periodic table: 4
Block in periodic table: d-block
CAS registry ID: 7440-62-2
Pure vanadium is a greyish silvery metal, and is soft and ductile. It has good corrosion resistance to alkalis, sulphuric acid, hydrochloric acid, and salt waters. The metal oxidizes readily above 660°C to form V2O5. Industrially, most vanadium produced is used as an additive to improve steels.
Name: nickel
Symbol: Ni
Atomic number: 28
Atomic weight: 58.6934 (2)
Group in periodic table: 10
Group name:
Period in periodic table: 4
Block in periodic table: d-block
CAS registry ID: 7440-02-0
Nickel is found as a constituent in most meteorites and often serves as one of the criteria for distinguishing a meteorite from other minerals. Iron meteorites, or siderites, may contain iron alloyed with from 5 to nearly 20% nickel. The USA 5-cent coin (whose nickname is "nickel") contains just 25% nickel. Nickel is a silvery white metal that takes on a high polish. It is hard, malleable, ductile, somewhat ferromagnetic, and a fair conductor of heat and electricity.
Nickel carbonyl, [Ni(CO)4], is an extremely toxic gas and exposure should not exceed 0.007 mg M-3.
Name: bromine
Symbol: Br
Atomic number: 35
Atomic weight: 79.904 (1)
Group in periodic table: 17
Group name: Halogen
Period in periodic table: 4
Block in periodic table: p-block
CAS registry ID: 7726-95-6
Bromine is the only liquid nonmetallic element. It is a member of the halogen group. It is a heavy, volatile, mobile, dangerous reddish-brown liquid. The red vapour has a strong unpleasant odour and the vapour irritates the eyes and throat. It is a bleaching. When spilled on the skin it produces painful sores. It is a serious health hazard, and maximum safety precautions should be taken when handling it.