Difference between revisions of "Oxygen"
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|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> | ||
− | |IE1 = 13. | + | |IE1 = 13.618 06 eV<br/>1313.5 kJ mol<sup>−1</sup> |
− | |IE2 = 3388.3 | + | |IE2 = 3388.3 kJ mol<sup>−1</sup> |
− | |IE3 = 5300.5 | + | |IE3 = 5300.5 kJ mol<sup>−1</sup> |
− | |EA1 = 1. | + | |EA1 = 1.461 112(44) eV |
|covalent-radius = 66 pm | |covalent-radius = 66 pm | ||
|vdw-radius = 152 pm | |vdw-radius = 152 pm | ||
|thermo-ref =  (O<sub>2</sub>)<ref name="NIST-O2"/> | |thermo-ref =  (O<sub>2</sub>)<ref name="NIST-O2"/> | ||
− | |entropy = 205.152(5) | + | |entropy = 205.152(5) J K<sup>−1</sup> mol<sup>−1</sup> |
− | |enthalpy-fusion = 0.444 | + | |enthalpy-fusion = 0.444 kJ mol<sup>−1</sup> |
− | |enthalpy-vaporization = 6.82 | + | |enthalpy-vaporization = 6.82 kJ mol<sup>−1</sup> |
− | |heat-capacity = 29.378 | + | |heat-capacity = 29.378 J K<sup>−1</sup> mol<sup>−1</sup> |
|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 06:27, 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).
- ↑ 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).
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