Neon

Neon, ₁₀Ne
Neon
Appearance	colourless gas exhibitin an orange-reid glow when placed in a heich voltage electric field
Standard atomic weight Ar, std(Ne)	20.1797(6)
Neon in the periodic cairt
	fluorine ← neon → sodium
Atomic nummer (Z)	10
Group	group 18 (noble gases)
Period	period 2
Block	p-block
Element category	Noble gas
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
whan liquid (at b.p.)	1.207 g/cm3
Treeple pynt	24.556 K, 43.37 kPa
Creetical pynt	44.4918 K, 2.7686 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)
Atomic properties
Oxidation states	0
Ionisation energies	(more);
Covalent radius	58 pm
Van der Waals radius	154 pm
	Colour lines in a spectral rangeSpectral lines o neon
Ither properties
Naitural occurrence	primordial
Creestal structur	face-centred cubic (fcc)
Speed o soond	(gas, 0 °C) 435 m/s
Thermal conductivity	49.1×10−3 W/(m·K)
Magnetic orderin	diamagnetic
Bulk modulus	654 GPa
CAS Nummer	7440-01-9
History
Prediction	William Ramsay (1897)
Diskivery	William Ramsay & Morris Travers (1898)
First isolation	William Ramsay & Morris Travers (1898)
Main isotopes o neon
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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

↑ Meija, Juris; et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry. 88 (3): 265–91. doi:10.1515/pac-2015-0305.
↑ Hammond, C.R. (2000). The Elements, in Handbook of Chemistry and Physics 81st edition (PDF). CRC press. p. 19. ISBN 0849304814.
↑ 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.
↑ ^a ^b Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nt ed.). CRC Press. p. 4.122. ISBN 1439855110.
↑ 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.
↑ 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.CS1 maint: multiple names: authors leet (link)
↑ "Neon: History". Softciências. Retrieved 27 Februar 2007.
↑ "HNe". NIST Chemistry WebBook. National Institute of Standards and Technology. Retrieved 23 Januar 2013.

[CIAAW2013-1] Meija, Juris; et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry. 88 (3): 265–91. doi:10.1515/pac-2015-0305.

[CRC-2] Hammond, C.R. (2000). The Elements, in Handbook of Chemistry and Physics 81st edition (PDF). CRC press. p. 19. ISBN 0849304814.

[ITS90-3] 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.

[b92-4] Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nt ed.). CRC Press. p. 4.122. ISBN 1439855110.

[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.CS1 maint: multiple names: authors leet (link)

[7] "Neon: History". Softciências. Retrieved 27 Februar 2007.

[8] "HNe". NIST Chemistry WebBook. National Institute of Standards and Technology. Retrieved 23 Januar 2013.

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