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Oxygen, 8OLiquid oxygen bylin |
Oxygen |
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Appearance | gas: colourless liquid: pale blue |
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Standard atomic weight Ar, std(O) | [7001159990300000000♠15.99903, 7001159997700000000♠15.99977] conventional: 7001159990000000000♠15.999 |
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Oxygen in the periodic cairt |
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Atomic nummer (Z) | 8 |
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Group | group 16 (chalcogens) |
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Period | period 2 |
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Block | p-block |
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Element category | Reactive nonmetal |
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Electron confeeguration | [He] 2s2 2p4 |
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Electrons per shell | 2, 6 |
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Pheesical properties |
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Phase at STP | gas |
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Meltin pynt | 54.36 K (−218.79 °C, −361.82 °F) |
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Bylin pynt | 90.188 K (−182.962 °C, −297.332 °F) |
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Density (at STP) | 1.429 g/L |
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whan liquid (at b.p.) | 1.141 g/cm3 |
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Treeple pynt | 54.361 K, 0.1463 kPa |
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Creetical pynt | 154.581 K, 5.043 MPa |
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Heat o fusion | (O2) 0.444 kJ/mol |
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Heat o vapourisation | (O2) 6.82 kJ/mol |
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Molar heat capacity | (O2) 29.378 J/(mol·K) |
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Vapour pressur
P (Pa)
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1
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10
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100
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1 k
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10 k
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100 k
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at T (K)
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|
|
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61
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73
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90
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Atomic properties |
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Oxidation states | −2, −1, 0, +1, +2 |
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Electronegativity | Pauling scale: 3.44 |
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Ionisation energies | - 1st: 1313.9 kJ/mol
- 2nd: 3388.3 kJ/mol
- 3rd: 5300.5 kJ/mol
- (more)
|
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Covalent radius | 66±2 pm |
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Van der Waals radius | 152 pm |
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Spectral lines o oxygen |
Ither properties |
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Naitural occurrence | primordial |
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Creestal structur | cubic |
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Speed o soond | 330 m/s (gas, at 27 °C) |
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Thermal conductivity | 26.58×10−3 W/(m·K) |
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Magnetic orderin | paramagnetic |
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Magnetic susceptibility | +3449.0·10−6 cm3/mol (293 K)[1] |
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CAS Nummer | 7782-44-7 |
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History |
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Diskivery | Carl Wilhelm Scheele (1771) |
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Named by | Antoine Lavoisier (1777) |
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Main isotopes o oxygen |
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| references |
style="text-align:left"|
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in
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calc from C
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diff
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report
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ref
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C
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−218.79
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—
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—
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K
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54.36
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54.36
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0
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F
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−361.82
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−361.82
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0
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|
WD
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String Module Error: Target string is empty !
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input
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C: −218.79, K: 54.36, F: −361.82
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comment
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style="text-align:left"|
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in
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calc from C
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diff
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report
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ref
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C
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−182.962
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—
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—
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K
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90.188
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90.188
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0
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F
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−297.332
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−297.332
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0
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WD
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String Module Error: Target string is empty !
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input
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C: −182.962, K: 90.188, F: −297.332
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comment
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References
Thir references will appear in the airticle, but this list appears anerly on this page.
- ↑ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.
- ↑ Meija, Juris; et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry. 88 (3): 265–91. doi:10.1515/pac-2015-0305.