Neon

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This airticle is aboot the noble gas. For ither uisses, see Neon (disambiguation).
Neon,  10Ne
Neon discharge tube.jpg
General properties
Appearance colourless gas exhibitin an orange-reid glow when placed in a heich voltage electric field
Staundart atomic wecht (Ar, staundart) 20.1797(6)
Neon in the periodic cairt
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Airn Cobalt Nickel Capper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Siller (element) Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gowd Mercur (element) Thallium Leid (element) Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Ununtrium Flerovium Ununpentium Livermorium Ununseptium Ununoctium
He

Ne

Ar
fluorineneonsodium
Atomic nummer (Z) 10
Group group 18 (noble gases)
Period period 2
Element category   noble gas
Block p-block
Electron confeeguration [He] 2s2 2p6
Electrons per shell
2, 8
Pheesical properties
Phase (at STP) gas
Meltin pynt 24.56 K ​(-248.59 °C, ​-415.46 °F)
Bylin pynt 27.104 K ​(-246.046 °C, ​-410.883 °F)
Density (at STP) 0.9002 g/L
when liquid (at b.p.) 1.207[1] g/cm3
Treeple pynt 24.556 K, ​43.37[2][3] kPa
Creetical pynt 44.4918 K, 2.7686[3] MPa
Heat o fusion 0.335 kJ/mol
Heat o vapourisation 1.71 kJ/mol
Molar heat capacity 5R/2 = 20.786 J/(mol·K)
Vapour pressur
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 12 13 15 18 21 27
Atomic properties
Oxidation states 1[4], 0
Ionisation energies
Covalent radius 58 pm
Van der Waals radius 154 pm
Color lines in a spectral range
Miscellanea
Creestal structurface-centred cubic (fcc)
Face-centered cubic creestal structur for neon
Speed o soond (gas, 0 °C) 435 m/s
Thermal conductivity 49.1×103  W/(m·K)
Magnetic orderin diamagnetic[5]
Bouk modulus 654 GPa
CAS Nummer 7440-01-9
History
Predeection William Ramsay (1897)
Diskivery William Ramsay & Morris Travers[6] (1898)
First isolation William Ramsay & Morris Travers[7] (1898)
Main isotopes o neon
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct
20Ne 90.48% stable
21Ne 0.27% stable
22Ne 9.25% stable
| references | in Wikidata

Neon is a chemical element wi seembol Ne an atomic nummer 10. It is in group 18 (noble gases) o the periodic table. Neon is a colourless, odorless, inert monatomic gas unner staundart condeetions, wi aboot twa-thirds the density o air. It wis discovered (alang wi krypton an xenon) in 1898 as ane o the three residual rare inert elements remainin in dry air, efter nitrogen, oxygen, argon an carbon dioxide are removed. Neon wis the seicont o thir three rare gases tae be discovered, an wis immediately recognised as a new element frae its bricht reid emission spectrum. The name neon is derived frae the Greek wird, νέον, neuter singular furm o νέος [neos], meanin new. Neon is chemically inert an furms na uncharged chemical compoonds.

References[eedit | eedit soorce]

  1. Hammond, C.R. (2000). The Elements, in Handbook of Chemistry and Physics 81st edition (PDF). CRC press. p. 19. ISBN 0849304814. 
  2. Preston-Thomas, H. (1990). "The International Temperature Scale of 1990 (ITS-90)". Metrologia. 27: 3–10. Bibcode:1990Metro..27....3P. doi:10.1088/0026-1394/27/1/002. 
  3. 3.0 3.1 Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nt ed.). CRC Press. p. 4.122. ISBN 1439855110. 
  4. "HNe". NIST Chemistry WebBook. National Institute of Standards and Technology. Retrieved 23 January 2013. 
  5. Magnetic susceptibility of the elements and inorganic compounds, in Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5. 
  6. Ramsay, William, Travers, Morris W. (1898). "On the Companions of Argon". Proceedings of the Royal Society of London. 63 (1): 437–440. doi:10.1098/rspl.1898.0057. 
  7. "Neon: History". Softciências. Retrieved February 27, 2007.