Chemical Property of Neon
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Chemical Property:
- Appearance/Colour:colourless odourless gas
- Vapor Pressure:1250000mmHg at 25°C
- Melting Point:-248.67 °C
- Boiling Point:-245.9 °C
- Flash Point:none
- PSA：0.00000
- Density:0.9002（0 °C）
- LogP:0.00000
- Water Solubility.:10.5mL/100g H2O (20°C, 101.32kPa) [KIR78]; Henry’s law constants, k×10?4: 13.023 (70.0°C), 12.022 (124.5°C), 9.805 (174.5°C), 7.166 (226.4°C), 4.160 (283.7°C) [POT78]
- Hydrogen Bond Donor Count:0
- Hydrogen Bond Acceptor Count:0
- Rotatable Bond Count:0
- Exact Mass:19.99244018
- Heavy Atom Count:1
- Complexity:0
- Transport DOT Label:Non-Flammable Gas
- Purity/Quality:
-
99% *data from raw suppliers
NEON 95.00% *data from reagent suppliers
Safty Information:
- Pictogram(s):
- Hazard Codes:
- Safety Statements:
38
- MSDS Files:
-
SDS file from LookChem
Total 1 MSDS from other Authors
Useful:
- Chemical Classes:Toxic Gases & Vapors -> Simple Asphyxiants
- Canonical SMILES:[Ne]
- Inhalation Risk:On loss of containment this substance can cause suffocation by lowering the oxygen content of the air in confined areas.
- Effects of Short Term Exposure:Asphyxiation.
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Description
In 1898, Dr William Ramsay and Morris M. Travers, a Scottish
scientist and a British scientist, respectively, discovered neon as
a condensation product in liquefied air, as in a process similar
to that used to collect neon today. Neon’s use in lighting
evolved from discoveries that gases under low pressure conduct
electricity. When some flowing electrons collide with residual
gas in an evacuated glass tube, the resulting ions emit light as
they return to their nonexcited state. The color of the light
depends on the residual gas; neon gas produces a red color and
argon, another inert gas often used in tubes (which are
frequently and incorrectly called neon lights), produces a blue
color. These two basic colors are often modified into many
different hues by the addition of such elements as mercury and
cadmium. The neon found on the Earth is considered to be
primordial in origin. Most of the neon is sequestered in the
Earth’s rocks or dissolved in water, with small amounts
escaping into the atmosphere during geologic weathering. The
escaped gas is slowly lost into space faster than it is replenished.
Consequently, neon constitutes only a small part (0.0018%) of
the Earth’s atmosphere, although this element is estimated to
be the fourth most abundant in the universe.
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Physical properties
Neon is a monatomic atom that is considered relatively inert. It does not even combinewith itself to form a diatomic molecule, as do some other gases (e.g., H2 and O2). Duringthe 1960s it was discovered that the noble gases are not really inert. Neon and the heaviernoble gases (Kr, Xe, and Rn) can form compounds when in an ionized state with some otherelements. For example, neon can form a two-atom ionized molecule of NeH+. Neon has alsobeen forced to form a compound with fluorine. Neon’s melting point is –248.59°C, its boiling point is –246.08°C, and its density is0.0008999 g/cm3.
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Uses
Gas in neon light tubes; ingredient of gaseous fillers for antifog devices, warning signals, electrical current detectors, high-voltage indicators for high-tension electric lines, lightning arresters, wave-meter tubes; in Ne-He lasers; in mixtures with He and Ar in Geiger counters. Liquid as cryogen to produce low temperetures. The most common use of neon is in the manufacture of luminescent electric tubes andspecialty high-voltage indicators. Neon is placed in enclosed glass tubes of various shapes withan electrode at each end. When neon gas is ionized by the passing of a high-voltage, low-ampselectrical current through it, a bright red color is produced. Other noble gases produce differentcolors, and they can be mixed. Unlike incandescent lamps, neon tubes can be bent andformed into unique shapes, including forming words and images for commercial advertisingand signage. Neon is primarily used in luminous tubes (vacuum electric
discharge tubes), airplane beacons, helium–neon lasers, highvoltage
indicators, cryogenic refrigerant, and laboratory
experiments. Other noble gases, especially helium and xenon,
have been found to be useful in anesthesiology and for
neuroprotection, but the few studies using neon have not
confirmed its usefulness in clinical medicine.
