Difference between revisions of "Neon"

Atomic properties
Atomic number	10
Standard atomic weight	20.1797(6)
Electron configuration	[He] 2s2 2p6
Physical properties
Melting point	24.56 K (−248.59 °C)
Boiling point	27.07 K (−246.08 °C)
Triple point	24.56 K, 0.4337 bar
Critical point	44.4 K, 27.56 bar
Density	0.853 kg m−3 (1 atm, 15 °C); 1.207 g cm−3 (l, 85.2 K)
Ionization energies
1st	21.564 539(7) eV,; 2080.6619(7) kJ mol−1
2nd	40.962 eV,; 3952.2 kJ mol−1
3rd	63.45 eV,; 6122 kJ mol−1
4th	97.11 eV,; 9370 kJ mol−1
5th	126.21 eV,; 12177 kJ mol−1
6th	157.93 eV; 15238 kJ mol−1
7th	207.27 eV,; 19999 kJ mol−1
8th	239.09 eV,; 23069 kJ mol−1
Atomic radii
Van der Waals radius	154 pm
Thermodynamic properties
Standard entropy	146.328(3) J K−1 mol−1
Enthalpy change of fusion	0.335 kJ mol−1
Enthalpy change of vaporization	1.790 kJ mol−1
Molar heat capacity (Cp)	21 J K−1 mol−1
Miscellaneous
CAS number	7440-01-9
EC number	231-110-9
	Where appropriate, and unless otherwise stated, data are given for 100 kPa (1 bar) and 298.15 K (25 °C).
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Latest revision as of 15:14, 13 April 2011

fluorine ← neon → sodium

He
↑
Ne
↓
Ar

Neon (symbol: Ne) is a noble gas.

↑ Neon. In NIST Chemistry WebBook; National Institute for Standards and Technology, <http://webbook.nist.gov/cgi/inchi/InChI%3D1S/Ne>. (accessed 13 April 2011).
↑ ^2.0 ^2.1 Neon. In Gas Encyclopedia; Air Liquide, <http://encyclopedia.airliquide.com/encyclopedia.asp?GasID=46>. (accessed 13 April).
↑ Kaufman, Victor; Minnhagen, Lennart Accurate Ground-Term Combinations in Ne I. J. Opt. Soc. Am. 1972, 62 (1), 92–95. DOI: 10.1364/JOSA.62.000092.
↑ Moore, Charlotte E. Ionization potentials and ionization limits derived from the analyses of optical spectra. Natl. Stand. Ref. Data Ser., (U.S. Natl. Bur. Stand.) 1970, 34, 1–22, <http://www.nist.gov/data/nsrds/NSRDS-NBS34.pdf>.
↑ Bondi, A. van der Waals Volumes and Radii. J. Phys. Chem. 1964, 68 (3), 441–51. DOI: 10.1021/j100785a001.
↑ Cox, J. D.; Wagman, D. D.; Medvedev, V. A. CODATA Key Values for Thermodynamics; Hemisphere: New York, 1989. ISBN 0891167587, <http://www.codata.org/resources/databases/key1.html>.

See also the corresponding article on Wikipedia.

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 |left = [[fluorine]]
 |right = [[sodium]]
-|above = [[Helium|He
+|above = [[Helium|He]]
 |below = [[Argon|Ar]]
 |atomic-number = 10