Chemicool

O

8

15.9994
Oxygen
General | States | Energies | Oxidation & Electrons |Appearance & Characteristics
Reactions | Other Forms |Radius | Conductivity | Abundance
Encyclopedia Britannica articles

General
Name Oxygen Symbol O
atomic number 8 Atomic weight 15.9994
Density @ 293 K 0.001429 g/cm3 Atomic volume 14.0 cm3/mol
Group Non-Metal, Chalcogen discovered 1774

States
state (s, l, g) g
melting point 54.8 K boiling point 90.2 K
Heat of fusion 0.22259 kJ/mol Heat of vaporization 3.4099 kJ/mol
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Energies
1st ionization energy 1313.9 kJ/mole electronegativity 3.44
2nd ionization energy 3388.2 kJ/mole electron affinity 140.97875 kJ/mole
3rd ionization energy 5300.3 kJ/mole Specific heat 0.92 J/gK
heat atomization 249 kJ/mole atoms

Oxidation & Electrons
Shells 2,6 electron configuration [He] 2s2 2p4
minimum oxidation number -2 maximum oxidation number 2
min. common oxidation no. -2 max. common oxidation no. 0
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Appearance & Characteristics
structure color colorless
uses rocket fuel, steel mfr. toxicity no
hardness mohs characteristics diatomic,2 forms: O2, O3

Reactions
reaction with air none reaction with 6M HCl none
reaction with 6M HCl none reaction with 15M HNO3 none
reaction with 6M NaOH none
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Other Forms
number of isotopes 3 hydride(s) H2O
oxide(s) O2 O3 chloride(s) Cl2O ClO2 Cl2O7

Radius
ionic radius (2- ion) 126 pm ionic radius (1- ion) pm
atomic radius 73 pm ionic radius (1+ ion) pm
ionic radius (2+ ion) pm ionic radius (3+ ion) pm
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Conductivity
thermal conductivity 0.03 J/m-sec-deg electrical conductivity 0 1/mohm-cm
polarizability 0.793 A^3

Abundance
source Air rel. abund. solar system 7.377 log
abundance earth's crust 5.7 log cost, pure 0.3 $/100g
cost, bulk $/100g
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