Difference between revisions of "Boron"
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|electronegativity = 2.04 (Pauling) | |electronegativity = 2.04 (Pauling) | ||
|solubility = insoluble | |solubility = insoluble | ||
| − | |IE-ref = <ref>{{NSRDS-NBS 34}}.</ref> | + | |IE-ref = <ref>{{citation | first1 = B. | last1 = Edlén | first2 = A. | last2 = Ölme | first3 = G. | last3 = Herzberg | first4 = J. W. C. | last4 = Johns | title = Ionization Potential of Boron, and the Isotopic and Fine Structure of 2s2p<sup>2</sup> <sup>2</sup>''D'' | journal = J. Opt. Soc. Am. | volume = 60 | issue = 7 | pages = 889–91 | year = 1970 | doi = 10.1364/JOSA.60.000889}}.</ref><ref>{{citation | last1 = Brown | first1 = C. M. | last2 = Tilford | first2 = S. G. | last3 = Ginter | first3 = M. L. | title = Absorption spectrum of B I in the 1350–1900-Å region | journal = J. Opt. Soc. Am. | year = 1974 | volume = 64 | issue = 6 | pages = 877–79 | doi = 10.1364/JOSA.64.000877}}.</ref><ref>{{NSRDS-NBS 34}}.</ref> |
|IE1 = 8.298 024(18) eV<br/>800.6377(17) kJ mol<sup>−1</sup> | |IE1 = 8.298 024(18) eV<br/>800.6377(17) kJ mol<sup>−1</sup> | ||
|IE2 = 25.154 eV<br/>2427.0 kJ mol<sup>−1</sup> | |IE2 = 25.154 eV<br/>2427.0 kJ mol<sup>−1</sup> | ||
| Line 26: | Line 26: | ||
|radius-ref = <ref>{{Cordero et al. (2008)}}.</ref> | |radius-ref = <ref>{{Cordero et al. (2008)}}.</ref> | ||
|covalent-radius = 84 pm | |covalent-radius = 84 pm | ||
| − | |thermo-ref = <ref>{{CODATA thermo}}.</ref> | + | |thermo-ref = <ref name="NIST"/><ref>{{CODATA thermo}}.</ref> |
|entropy = 5.90(8) J K<sup>−1</sup> mol<sup>−1</sup> | |entropy = 5.90(8) J K<sup>−1</sup> mol<sup>−1</sup> | ||
|enthalpy-atomization = 565(5) kJ mol<sup>−1</sup> | |enthalpy-atomization = 565(5) kJ mol<sup>−1</sup> | ||
|entropy-atomization = 147.54(8) J K<sup>−1</sup> mol<sup>−1</sup> | |entropy-atomization = 147.54(8) J K<sup>−1</sup> mol<sup>−1</sup> | ||
| + | |enthalpy-fusion = 48.93 kJ mol<sup>−1</sup> | ||
|CAS-number = 7440-42-8 | |CAS-number = 7440-42-8 | ||
|EC-number = 231-151-2 | |EC-number = 231-151-2 | ||
Revision as of 18:41, 21 September 2010
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Boron (symbol: B) is a chemical element.
Notes and references
Notes
References
- ↑ 1.0 1.1 Boron. In NIST Chemistry WebBook; National Institute for Standards and Technology, <http://webbook.nist.gov/cgi/inchi/InChI%3DInChI=1S/B>. (accessed 21 September 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.
- ↑ Edlén, B.; Ölme, A.; Herzberg, G.; Johns, J. W. C. Ionization Potential of Boron, and the Isotopic and Fine Structure of 2s2p2 2D. J. Opt. Soc. Am. 1970, 60 (7), 889–91. DOI: 10.1364/JOSA.60.000889.
- ↑ Brown, C. M.; Tilford, S. G.; Ginter, M. L. Absorption spectrum of B I in the 1350–1900-Å region. J. Opt. Soc. Am. 1974, 64 (6), 877–79. DOI: 10.1364/JOSA.64.000877.
- ↑ 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>.
- ↑ Scheer, Michael; Bilodeau, René C.; Haugen, Harold K. Negative ion of boron: An experimental study of the 3P ground state. Phys. Rev. Lett. 1998, 80 (12), 2562–65. DOI: 10.1103/PhysRevLett.80.2562.
- ↑ 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.
- ↑ 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>.
External links
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See also the corresponding article on Wikipedia. |
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