Difference between revisions of "Oxygen"
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|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 = 54.8(2) K (−218.8 °C) |
| − | |boiling-point = −183.0 °C | + | |boiling-point = 90.2(2) K (−183.0 °C) |
| − | |critical-point = 154. | + | |critical-point = 154.58 K, 50.43 bar |
|electronegativity = 3.44 (Pauling) | |electronegativity = 3.44 (Pauling) | ||
| − | |IE1 = 1313.5 kJ/mol | + | |IE1 = 13.61806 eV<br/>1313.5 kJ/mol |
|IE2 = 3388.3 kJ/mol | |IE2 = 3388.3 kJ/mol | ||
|IE3 = 5300.5 kJ/mol | |IE3 = 5300.5 kJ/mol | ||
| + | |EA1 = 1.461112(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>{{NIST}}</ref> |
| − | |enthalpy-vaporization = | + | |entropy = 205.152(5) J K<sup>−1</sup> mol<sup>−1</sup> |
| − | |heat-capacity = | + | |enthalpy-fusion = 0.444 kJ/mol |
| − | |CAS-number = 7782-44-7 | + | |enthalpy-vaporization = 6.82 kJ/mol |
| + | |heat-capacity = 29.378 J K<sup>−1</sup> mol<sup>−1</sup> | ||
| + | |CAS-number = 7782-44-7 (O<sub>2</sub>) | ||
|EC-number = 231-956-9 | |EC-number = 231-956-9 | ||
}} | }} | ||
'''Oxygen''' ({{IPA|ˈɒksɨdʒɨn}}) is a colourless gas which makes up about one fifth of the Earth's atmosphere. Its name comes from the [[Greek language|Greek]] ὀξύς (''oxys''; acid, literally "sharp", from the taste of acids) and -γενής (''-genēs''; producer, literally "begetter"). | '''Oxygen''' ({{IPA|ˈɒksɨdʒɨn}}) is a colourless gas which makes up about one fifth of the Earth's atmosphere. Its name comes from the [[Greek language|Greek]] ὀξύς (''oxys''; acid, literally "sharp", from the taste of acids) and -γενής (''-genēs''; producer, literally "begetter"). | ||
| + | |||
| + | ==References== | ||
| + | {{reflist}} | ||
[[Category:Chemical elements]] | [[Category:Chemical elements]] | ||
Revision as of 05:13, 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
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