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Oxygen Element Properties, Non-Metal, Chalcogen Group, Periodic Table of the Elements

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Oxygen

Oxygen Element Properties

p7
N
Nitrogen
p8
O
Oxygen
p9
F
Fluorine
General
NameOxygen
SymbolO
Number8
Group Number16
GroupNon-Metal, Chalcogen
Blockp
Density0.001429 g/cm3
Atomic Weight15.9994 g/mol
Atomic Volume14.0 cm3/mol
Discover1774


States
StateGas
Melting Point54.36 K
Boiling Point90.20 K
Triple PointNil
Critical Point154.59 K
Heat of Fusion0.444 kJ/mol
Heat of Vaporization6.82 kJ/mol


Energies
First Ionization Energy1313.9 kJ/mole
Second Ionization Energy3388.2 kJ/mole
Third Ionization Energy5300.3 kJ/mole
Electronegativity3.44
Electron Affinity140.97875 kJ/mole
Specific Heat0.92 J/gK
Heat Atomization249 kJ/mole atoms


Oxidation and Electrons
Shells2,6
Electron Configuration1s2 2s2 2p4
Minimum Oxidation Number-2
Maximum Oxidation Number2
Minimum Common Oxidation Number-2
Maximum Common Oxidation Number0


Appearance and Characteristics
Crystal Structurecubic
Characteristicsdiatomic,2 forms: O2, O3
Colorcolorless
Usesrocket fuel, steel mfr.
Hardnessmohs
ToxicityNo


Reactions
Reaction with AirNone
Reaction with 6M HClNone
Reaction with 15M HNO3None
Reaction with 6M NaOHNone


Other Forms
Number of Isotopes3
HydrideH2O
OxideO2 O3
ChlorideCl2O ClO2 Cl2O7


Radius
Atomic Radius73 pm
Ionic Radius (1+ ion)Nil
Ionic Radius (1- ion)Nil
Ionic Radius (2+ ion)Nil
Ionic Radius (2- ion)126 pm
Ionic Radius (3+ ion)Nil


Conductivity
Thermal Conductivity0.03 J/m-sec-deg
Electrical Conductivity0 1/mohm-cm
Polarizability0.793 A3


Abundance
SourceAir
Relation Abundance Solar System7.377 log
Abundance Earth's Crust5.7 log


p7
N
Nitrogen
p8
O
Oxygen
p9
F
Fluorine




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