Oxygen, 8O Liquid oxygen bylin |
| Oxygen |
|---|
| Appearance | gas: colourless
liquid: pale blue |
|---|
| Standard atomic weight Ar, std(O) | [7001159990300000000♠15.99903, 7001159997700000000♠15.99977] conventional: 7001159990000000000♠15.999 |
|---|
| Oxygen in the periodic cairt |
|---|
|
|
| Atomic nummer (Z) | 8 |
|---|
| Group | group 16 (chalcogens) |
|---|
| Period | period 2 |
|---|
| Block | p-block |
|---|
| Element category | Reactive nonmetal |
|---|
| Electron confeeguration | [He] 2s2 2p4 |
|---|
| Electrons per shell | 2, 6 |
|---|
| Pheesical properties |
|---|
| Phase at STP | gas |
|---|
| Meltin pynt | 54.36 K (−218.79 °C, −361.82 °F) |
|---|
| Bylin pynt | 90.188 K (−182.962 °C, −297.332 °F) |
|---|
| Density (at STP) | 1.429 g/L |
|---|
| whan liquid (at b.p.) | 1.141 g/cm3 |
|---|
| Treeple pynt | 54.361 K, 0.1463 kPa |
|---|
| Creetical pynt | 154.581 K, 5.043 MPa |
|---|
| Heat o fusion | (O2) 0.444 kJ/mol |
|---|
| Heat o vapourisation | (O2) 6.82 kJ/mol |
|---|
| Molar heat capacity | (O2) 29.378 J/(mol·K) |
|---|
Vapour pressur
| P (Pa)
|
1
|
10
|
100
|
1 k
|
10 k
|
100 k
|
| at T (K)
|
|
|
|
61
|
73
|
90
|
|
| Atomic properties |
|---|
| Oxidation states | −2, −1, 0, +1, +2 |
|---|
| Electronegativity | Pauling scale: 3.44 |
|---|
| Ionisation energies | - 1st: 1313.9 kJ/mol
- 2nd: 3388.3 kJ/mol
- 3rd: 5300.5 kJ/mol
- (more)
|
|---|
| Covalent radius | 66±2 pm |
|---|
| Van der Waals radius | 152 pm |
|---|
 Colour lines in a spectral rangeSpectral lines o oxygen |
| Ither properties |
|---|
| Naitural occurrence | primordial |
|---|
| Creestal structur | cubic |
|---|
| Speed o soond | 330 m/s (gas, at 27 °C) |
|---|
| Thermal conductivity | 26.58×10−3 W/(m·K) |
|---|
| Magnetic orderin | paramagnetic |
|---|
| Magnetic susceptibility | +3449.0·10−6 cm3/mol (293 K)[1] |
|---|
| CAS Nummer | 7782-44-7 |
|---|
| History |
|---|
| Diskivery | Carl Wilhelm Scheele (1771) |
|---|
| Named by | Antoine Lavoisier (1777) |
|---|
| Main isotopes o oxygen |
|---|
|
|
| | references |
| style="text-align:left"|
|
|
|
in
|
calc from C
|
diff
|
report
|
ref
|
| C
|
−218.79
|
—
|
—
|
|
|
| K
|
54.36
|
54.36
|
0
|
|
|
| F
|
−361.82
|
−361.82
|
0
|
|
|
| WD
|
String Module Error: Target string is empty ! 
|
|
|
|
| input
|
C: −218.79, K: 54.36, F: −361.82
|
| comment
|
|
| style="text-align:left"|
|
|
|
in
|
calc from C
|
diff
|
report
|
ref
|
| C
|
−182.962
|
—
|
—
|
|
|
| K
|
90.188
|
90.188
|
0
|
|
|
| F
|
−297.332
|
−297.332
|
0
|
|
|
| WD
|
String Module Error: Target string is empty !
|
|
|
|
| input
|
C: −182.962, K: 90.188, F: −297.332
|
| comment
|
|
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.
