Neon

10
Ne
Gruppe
18
Periode
2
Blok
p
Protons
Electrons
Neutrons
10
10
10
General Properties
Atomnummer
10
Atommasse
20,1797
Mass Number
20
Kategori
Ædelgasser
Farve
Colorless
Radioactive
Nej
From the Greek word neos, new
Krystalstruktur
Fladecentreret Kubisk
History
Neon was discovered in 1898 by the British chemists Sir William Ramsay and Morris W. Travers in London.

It was discovered when Ramsay chilled a sample of air until it became a liquid, then warmed the liquid and captured the gases as they boiled off.

After 1902, Georges Claude's company, Air Liquide, was producing industrial quantities of neon as a byproduct of his air liquefaction business.
Elektroner i hver skal
2, 8
Elektronkonfiguration
[He] 2s2 2p6
Ne
In a vacuum discharge tube, neon glows reddish orange
Physical Properties
Tilstandsform
Gas
Massefylde
0,0008999 g/cm3
Smeltepunkt
24,56 K | -248,59 °C | -415,46 °F
Kogepunkt
27,07 K | -246,08 °C | -410,94 °F
Smeltevarme
0,34 kJ/mol
Fordampningsvarme
1,75 kJ/mol
Varmefylde
1,03 J/g·K
Abundance in Earth's crust
3×10-7%
Abundance in Universe
0,13%
Vial
Billede akkrediteringer: Images-of-elements
Vial of glowing ultrapure neon
CAS Number
7440-01-9
PubChem CID Number
23935
Atomic Properties
Atomradius
38 pm
Kovalent radius
58 pm
Elektronegativitet
-
Ionization Potential
21,5645 eV
Atomic Volume
16,7 cm3/mol
Varmeledningsevne
0,000493 W/cm·K
Oxidationstrin
0
Applications
Neon is often used in brightly lit advertising signs.

It is also used in vacuum tubes, high-voltage indicators, lightning arrestors, wave meter tubes, television tubes, and helium-neon lasers.

Liquid neon is used as a cryogenic refrigerant.
Neon is not known to be toxic
Isotoper
Stable Isotopes
20Ne, 21Ne, 22Ne
Unstable Isotopes
16Ne, 17Ne, 18Ne, 19Ne, 23Ne, 24Ne, 25Ne, 26Ne, 27Ne, 28Ne, 29Ne, 30Ne, 31Ne, 32Ne, 33Ne, 34Ne