Difference between revisions of "Oxygen"
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|atomic-number = 8 | |atomic-number = 8 | ||
|atomic-weight = 15.9994(3) | |atomic-weight = 15.9994(3) | ||
| − | |configuration = [He] | + | |configuration = [He] 2s<sup>2</sup> 2p<sup>4</sup> |
|phys-ref =  (O<sub>2</sub>)<ref name="NIST-O2">{{NIST chemistry | name = Oxygen | id = 1S/O2/c1-2 | accessdate = 2010-03-15}}.</ref> | |phys-ref =  (O<sub>2</sub>)<ref name="NIST-O2">{{NIST chemistry | name = Oxygen | id = 1S/O2/c1-2 | accessdate = 2010-03-15}}.</ref> | ||
|melting-point = 54.8(2) K (−218.8 °C) | |melting-point = 54.8(2) K (−218.8 °C) | ||
|boiling-point = 90.2(2) K (−183.0 °C) | |boiling-point = 90.2(2) K (−183.0 °C) | ||
|critical-point = 154.58 K, 50.43 bar | |critical-point = 154.58 K, 50.43 bar | ||
| + | |chem-ref = <ref>{{citation | first = A. L. | last = Allred | title = Electronegativity values from thermochemical data | journal = J. Inorg. Nucl. Chem. | year = 1961 | volume = 17 | issue = 3–4 | page = 215–21 | doi = 10.1016/0022-1902(61)80142-5}}.</ref> | ||
|electronegativity = 3.44 (Pauling) | |electronegativity = 3.44 (Pauling) | ||
|IE-ref = <ref name="NIST-Oat">{{NIST chemistry | name = Oxygen, atomic | id = 1S/O | accessdate = 2010-03-15}}.</ref> | |IE-ref = <ref name="NIST-Oat">{{NIST chemistry | name = Oxygen, atomic | id = 1S/O | accessdate = 2010-03-15}}.</ref> | ||
| Line 24: | Line 25: | ||
|IE8 = 871.4097 eV | |IE8 = 871.4097 eV | ||
|IE-total = 2043.8432 eV | |IE-total = 2043.8432 eV | ||
| + | |EA-ref = <ref name="NIST-Oat"/> | ||
|EA1 = 140.9759(42) kJ mol<sup>−1</sup> | |EA1 = 140.9759(42) kJ mol<sup>−1</sup> | ||
| + | |radius-ref = | ||
|covalent-radius = 66 pm | |covalent-radius = 66 pm | ||
|vdw-radius = 152 pm | |vdw-radius = 152 pm | ||
| Line 31: | Line 34: | ||
|enthalpy-fusion = 0.444 kJ mol<sup>−1</sup> | |enthalpy-fusion = 0.444 kJ mol<sup>−1</sup> | ||
|enthalpy-vaporization = 6.82 kJ mol<sup>−1</sup> | |enthalpy-vaporization = 6.82 kJ mol<sup>−1</sup> | ||
| + | |enthalpy-atomization = | ||
|heat-capacity = 29.378 J K<sup>−1</sup> mol<sup>−1</sup> | |heat-capacity = 29.378 J K<sup>−1</sup> mol<sup>−1</sup> | ||
| + | |misc-ref = | ||
|CAS-number = 7782-44-7 (O<sub>2</sub>)<br/>17778-80-2 (atomic) | |CAS-number = 7782-44-7 (O<sub>2</sub>)<br/>17778-80-2 (atomic) | ||
|EC-number = 231-956-9 | |EC-number = 231-956-9 | ||
Revision as of 12:50, 15 March 2010
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Oxygen (ˈɒksɨdʒɨn) is a colourless gas which makes up about one fifth of the Earth's atmosphere. Its name comes from the Greek ὀξύς (oxys; acid, literally "sharp", from the taste of acids) and -γενής (-genēs; producer, literally "begetter").
References
- ↑ 1.0 1.1 Oxygen. In NIST Chemistry WebBook; National Institute for Standards and Technology, <http://webbook.nist.gov/cgi/inchi/InChI%3D1S/O2/c1-2>. (accessed 15 March 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.
- ↑ 3.0 3.1 Oxygen, atomic. In NIST Chemistry WebBook; National Institute for Standards and Technology, <http://webbook.nist.gov/cgi/inchi/InChI%3D1S/O>. (accessed 15 March 2010).
External links
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See also the corresponding article on Wikipedia. |
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