Difference between revisions of "Oxygen"
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|left = [[nitrogen]] | |left = [[nitrogen]] | ||
|right = [[fluorine]] | |right = [[fluorine]] | ||
| − | |above = | + | |above = – |
|below = [[sulfur|S]] | |below = [[sulfur|S]] | ||
|atomic-number = 8 | |atomic-number = 8 | ||
|atomic-weight = 15.9994(3) | |atomic-weight = 15.9994(3) | ||
| − | |configuration = [He]2s<sup>2</sup>2p<sup>4</sup> | + | |configuration = [He] 2s<sup>2</sup> 2p<sup>4</sup> |
|melting-point = −218.8 °C | |melting-point = −218.8 °C | ||
|boiling-point = −183.0 °C | |boiling-point = −183.0 °C | ||
| Line 16: | Line 16: | ||
|IE2 = 3388.3 kJ/mol | |IE2 = 3388.3 kJ/mol | ||
|IE3 = 5300.5 kJ/mol | |IE3 = 5300.5 kJ/mol | ||
| − | |covalent-radius = 66 | + | |covalent-radius = 66 pm |
| − | |vdw-radius = 152 | + | |vdw-radius = 152 pm |
| − | |enthalpy-fusion=(O<sub>2</sub>) 0.444 | + | |enthalpy-fusion = (O<sub>2</sub>) 0.444 kJ/mol |
| − | |enthalpy-vaporization=(O<sub>2</sub>) 6.82 | + | |enthalpy-vaporization = (O<sub>2</sub>) 6.82 kJ/mol |
| − | |heat-capacity=(O<sub>2</sub>)< | + | |heat-capacity = (O<sub>2</sub>) 29.378 J K<sup>−1</sup> mol<sup>−1</sup> |
|CAS-number = 7782-44-7 | |CAS-number = 7782-44-7 | ||
|EC-number = 231-956-9 | |EC-number = 231-956-9 | ||
Revision as of 21:26, 14 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").
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