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Oxygen

Chemical, physical and material properties and data of the chemical element Oxygen.

Content
General data
Atomar properties
Electron configutation
Ionization energies
Isotopic data
Chemistry
Electrode potential
Physical properties
External data
Oxygen

 

General Information about Oxygen

Regular nameOxygenChemical symbolOOther namesSystematic nameHistorical namesName meaning, originDiscovery (year)OccurencePosition in the PSEGroup membership

 

Atomar Properties of Oxygen

Atomic number Z8 = number of protonsStandard Atomic Weight15.999
intervall: [15.99903, 15.99977]

 

Electron configuration of Oxygen

1s2s2p3s3p3d4s4p4d4f5s5p5d5f6s6p6d6f7s7p
224

Abbreviated form: [He] 2s2 2p4 .

 

Ionization Energies of Oxygen

The following table lists the ionization energies IE (ionization potentials); the IE is the energy required in electron volts (eV) per atom to separate a given electron from an Oxygen atom.

IE1IE2IE3IE4IE5IE6IE7IE8
13.6180535.121154.935577.41353113.8990138.1197739.29871.4101

 

Isotopic Data of Oxygen

An overview of the nuclides as well as the isotopic data and properties are listed on the following page: Oxygen isotopes.

 

Chemistry of Oxygen

 

Electronegativity3.5 (Pauling original)
3.44 (Pauling)
3.610 (Allen)
3.0 (Mulliken)
3.46 (Sanderson)
3.50 (Allred-Rochow)
8.7861 eV (Gosh Gupta)
7.54 eV (Pearson)Electron affinity1.461 113 6(9) eV
140.976 0(2) kJ mol-1

 

Standard Electrode Potential

E0 (V)SymbolNoxName Ox.
Name Red.		Ox.
Red.		e-
-0.13O0
- I		Oxygen
Hydroperoxy radical		O2 (g) + H+
⇄ HO2• (aq)		+ e-
0.401O0
- II		Oxygen
Hydroxy anion		O2 (g) + 2 H2O
⇄ 4 OH-		+ 4 e-
1.229O0
- II		Oxygen
Water		2 O2 (g) + 4 H+
⇄ 2 H2O		+ 4 e-
1.51O- 0,5
- I		Hydroperoxy radical
Hydrogen peroxide		HO2• + H+
⇄ H2O2		+ e-
1.763O- I
- II		Hydrogen peroxide
Water		H2O2 (aq) + 2 H+
⇄ 2 H2O		+ 2 e-
2.01O- I
- II		Peroxodisulfate
Sulfate		S2O82-
⇄ 2 SO42-		+ 2 e-
2.075O0
- II		Ozone
Water		O3 + 2 H+
⇄ O2 + H2O		+ 2 e-

 

Material and Physical Properties

Melting point- 218.79 °CEnthalpy of fusion (molar)0.444 kJ mol-1Boiling point- 182.962 °CEnthalpy of vaporization6.82 kJ mol-1Density1.429 g L -1 (0°C; 101.325 kPa. O2)

 

External Data, Identifiers

CAS registry number7782-44-7InChI =1S/OInChIKeyQVGXLLKOCUKJST-UHFFFAOYSA-NPubChem ID977

 

More Chemistry

isotopes

 

 

 

 

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Last update: 2022-12-12

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