Oxygen is the third most abundant element in the universe. It is
a non-metallic element with the symbol O, the atomic number 8,
an atomic weight of 15.999, and a melting point of about
-218.4°C. Oxygen gas is colorless, odorless, and tasteless. The
liquid and solid forms are a pale blue color and are strongly
paramagnetic. |Previous Element: Nitrogen Next Element: Fluorine
|Phase at Room Temp.||gas| |Melting Point (K)||54.8| |Boiling
Point (K)||90.2| |Heat of Fusion (kJ/mol)||0.4| |Heat of
Vaporization (kJ/mol)||---| |Heat of Atomization (kJ/mol)||249|
|Thermal Conductivity (J/m sec K)||0.03| |Electrical
Conductivity (1/mohm cm)||0| |Number of Isotopes||3| |Electron
Affinity (kJ/mol)||140.9788| |First Ionization Energy
(kJ/mol)||1313.9| |Second Ionization Energy (kJ/mol)||3388.2|
|Third Ionization Energy (kJ/mol)||5300.3| |Atomic Volume
(cm3/mol)||13.9| |Ionic Radius2- (pm)||126| |Ionic Radius1-
(pm)||---| |Atomic Radius (pm)||73| |Ionic Radius1+ (pm)||---|
|Ionic Radius2+ (pm)||---| |Ionic Radius3+ (pm)||---