Difference between revisions of "Hydrogen"
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|boiling-point = 20.39 K (−252.76 °C) | |boiling-point = 20.39 K (−252.76 °C) | ||
|critical-point = 33.18 K, 13.00(1) bar | |critical-point = 33.18 K, 13.00(1) bar | ||
| − | |triple-point = 13. | + | |triple-point = 13.96(5) K, 0.0721(4) bar |
| − | |density = 0.085 kg m<sup>−3</sup> (1 atm, 15 °C)<br/>1.312 kg m<sup>−3</sup> (1 atm, 20.4 K)<br/>0.070 973 g cm<sup>−3</sup> (l, 20.4 K) | + | |density = 0.085 kg m<sup>−3</sup> (1 atm, 15 °C)<br/>1.312 kg m<sup>−3</sup> (1 atm, 20.4 K)<br/>0.070 973 g cm<sup>−3</sup> (l, 20.4 K) |
|chem-ref = <ref name="AirLiquide"/><ref>{{Allred (1961)}}.</ref> | |chem-ref = <ref name="AirLiquide"/><ref>{{Allred (1961)}}.</ref> | ||
|electronegativity = 2.20 (Pauling) | |electronegativity = 2.20 (Pauling) | ||
| − | |solubility = 21.4 cm<sup>3</sup> kg<sup>−1</sup> (1 atm, 0 °C) | + | |solubility = 21.4 cm<sup>3</sup> kg<sup>−1</sup> (1 atm, 0 °C) |
|IE-ref = <ref>{{NBS 34}}.</ref> | |IE-ref = <ref>{{NBS 34}}.</ref> | ||
|IE1 = 13.598 432 44(36) eV<br/>1305.584 631(12) kJ mol<sup>−1</sup> | |IE1 = 13.598 432 44(36) eV<br/>1305.584 631(12) kJ mol<sup>−1</sup> | ||
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|enthalpy-atomization = 217.998(6) kJ mol<sup>−1</sup> | |enthalpy-atomization = 217.998(6) kJ mol<sup>−1</sup> | ||
|entropy-atomization = 114.717(2) J K<sup>−1</sup> mol<sup>−1</sup> | |entropy-atomization = 114.717(2) J K<sup>−1</sup> mol<sup>−1</sup> | ||
| + | |heat-capacity = 29 J K<sup>−1</sup> mol<sup>−1</sup> | ||
|hazard-ref = <ref name="AirLiquide"/><ref>{{CLP Regulation|index=001-001-00-9|page=340}}</ref> | |hazard-ref = <ref name="AirLiquide"/><ref>{{CLP Regulation|index=001-001-00-9|page=340}}</ref> | ||
|pictograms = {{GHS02|Flam. Gas 1}}{{GHS04|Press. Gas}} | |pictograms = {{GHS02|Flam. Gas 1}}{{GHS04|Press. Gas}} | ||
Latest revision as of 18:52, 21 September 2010
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Hydrogen (symbol: H) is a chemical element, the most abundant element in the universe.
Notes and references
Notes
References
- ↑ Hydrogen. In NIST Chemistry WebBook; National Institute for Standards and Technology, <http://webbook.nist.gov/cgi/inchi/InChI%3D1S/H2/h1H>. (accessed 20 June 2010).
- ↑ 2.0 2.1 Greenwood, Norman N.; Earnshaw, A. Chemistry of the Elements; Pergamon: Oxford, 1984; pp 38–74. ISBN 0-08-022057-6.
- ↑ 3.0 3.1 3.2 Hydrogen. In Gas Encyclopedia; Air Liquide, <http://encyclopedia.airliquide.com/encyclopedia.asp?GasID=36>. (accessed 3 April 2010).
- ↑ Allred, A. L. Electronegativity values from thermochemical data. J. Inorg. Nucl. Chem. 1961, 17 (3–4), 215–21. DOI: 10.1016/0022-1902(61)80142-5.
- ↑ 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>.
- ↑ Hotop, H.; Lineberger, W. C. Binding energies in atomic negative ions. II. J. Phys. Chem. Ref. Data 1985, 14 (3), 731–50. DOI: 10.1063/1.555735.
- ↑ Cordero, Beatriz; Gómez, Verónica; Platero-Prats, Ana E.; Revés, Marc; Echeverría, Jorge; Cremades, Eduard; Barragán, Flavia; Alvarez, Santiago Covalent radii revisited. Dalton Trans. 2008 (5), 2832–38. DOI: 10.1039/b801115j.
- ↑ 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>.
- ↑ Index no. 001-001-00-9 of Annex VI, Part 3, to Regulation (EC) No 1272/2008 of the European Parliament and of the Council of 16 December 2008 on classification, labelling and packaging of substances and mixtures, amending and repealing Directives 67/548/EEC and 1999/45/EC, and amending Regulation (EC) No 1907/2006. OJEU L353, 31.12.2008, pp 1–1355 at p 340.
External links
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See also the corresponding article on Wikipedia. |
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