Wikipedia

Neon

chemical element with symbol Ne and atomic number 10; rare gas

Neon is a chemical element on the periodic table. It is part of the noble gas group and it has an atomic number of 10. It is an odorless and tasteless gas (at 15 degrees Celsius at a standard pressure).

Neon, 00Ne
Neon
Appearancecolorless gas exhibiting an orange-red glow when placed in an electric field
Standard atomic weight Ar°(Ne)
20.1797(6)[1]
Neon in the periodic table
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 Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver 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 Gold Mercury (element) Thallium Lead 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 Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson
He
↑
Ne
↓
Ar
fluorine ← neon → sodium
Groupgroup 18 (noble gases)
Periodperiod 2
Block  p-block
Electron configuration[He] 2s2 2p6
Electrons per shell2, 8
Physical properties
Phase at STPgas
Melting point24.56 K ​(−248.59 °C, ​−415.46 °F)
Boiling point27.104 K ​(−246.046 °C, ​−410.883 °F)
Density (at STP)0.9002 g/L
when liquid (at b.p.)1.207 g/cm3[2]
Triple point24.556 K, ​43.37 kPa[3][4]
Critical point44.4918 K, 2.7686 MPa[4]
Heat of fusion0.335 kJ/mol
Heat of vaporization1.71 kJ/mol
Molar heat capacity20.79[5] J/(mol·K)
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 12 13 15 18 21 27
Atomic properties
Oxidation states0
Ionization energies
  • 1st: 2080.7 kJ/mol
  • 2nd: 3952.3 kJ/mol
  • 3rd: 6122 kJ/mol
  • (more)
Covalent radius58 pm
Van der Waals radius154 pm
Color lines in a spectral range
Spectral lines of neon
Other properties
Natural occurrenceprimordial
Crystal structure ​face-centered cubic (fcc)
Face-centered cubic crystal structure for neon
Speed of sound435 m/s (gas, at 0 °C)
Thermal conductivity49.1×10−3 W/(m⋅K)
Magnetic orderingdiamagnetic[6]
Molar magnetic susceptibility−6.74·10−6 cm3/mol (298 K)[7]
Bulk modulus654 GPa
CAS Number7440-01-9
History
PredictionWilliam Ramsay (1897)
Discovery and first isolationWilliam Ramsay & Morris Travers[8][9] (1898)
Isotopes of neon
Main isotopes[10] Decay
abun­dance half-life (t1/2) mode pro­duct
20Ne 90.5% stable
21Ne 0.27% stable
22Ne 9.25% stable
 Category: Neon
| references


Neon does not react with other elements, so it is found by itself. There is not much neon in the air, and it is clear, so we do not see it.

It was previously thought that Neon could not bond with any other elements, creating compounds. However, there have been a few compounds that have been made with neon, such as NeAuF and NeBeS.

History

change

Two British scientists, Sir William Ramsay and Morris Travers, discovered neon, argon, krypton, and xenon. Together they discovered a brand new gas element in 1898. Four years before, Ramsay, a physical chemist, had found argon and was the first person to isolate helium in 1895. The scientists froze argon, using liquid air, and then evaporated this to collect the gas that is produced. Using a high voltage, they collected the first sample of the gas. To their surprise, the gas illuminated the glass tubes and glowed with bright crimson light.[11]

Upon discovery, the two scientists decided to name the new gas Neon, after the Greek word Neos, meaning the new one. While Ramsay and Travers discovered neon gas, they didn’t invent neon lamps. It wasn’t until 1902 when French engineer and inventor Georges Claude showcased the first neon light.

Uses

change

Neon gas is used in gas discharge lamps. When electricity goes through the neon, it lights up red. Due to this quality, it is used in light up signs. Similar signs use other gases to make other colors, but they are also often called "neon signs". Neon is also a term referring to a type of color that is very bright, such as lime green.

 
Neon
change

References

change
  1. ↑ "Standard Atomic Weights: Neon". CIAAW. 1985.
  2. ↑ Hammond, C. R. (2000). The Elements, in Handbook of Chemistry and Physics 81st edition (PDF). CRC press. p. 19. ISBN 0849304814.
  3. ↑ 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.
  4. ↑ 4.0 4.1 Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 4.122. ISBN 1439855110.
  5. ↑ Shuen-Chen Hwang, Robert D. Lein, Daniel A. Morgan (2005). "Noble Gases". Kirk Othmer Encyclopedia of Chemical Technology. Wiley. pp. 343–383. doi:10.1002/0471238961.0701190508230114.a01.
  6. ↑ 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.
  7. ↑ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.
  8. ↑ 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.
  9. ↑ "Neon: History". Softciências. Retrieved 2007-02-27.
  10. ↑ Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.
  11. ↑ Mama, Neon. "The History Of Neon Signs and Lights". Neon Mama. Archived from the original on 2022-05-27. Retrieved 2022-03-23.


Retrieved from "https://simple.wikipedia.org/w/index.php?title=Neon&oldid=9915781"