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Oxygen is the element with atomic number 8 and represented by the symbol O. It is a member of the chalcogen group on the periodic table, and is a highly reactive nonmetallic period 2 element that readily forms compounds (notably oxides) with almost all other elements. At standard temperature and pressure two atoms of the element bind to form dioxygen, a colorless, odorless, tasteless diatomic gas with the formula O2. Oxygen is the third most abundant element in the universe by mass after hydrogen and helium and the most abundant element by mass in the Earth's crust. Oxygen constitutes 88.8% of the mass of water and 20.9% of the volume of air.


Atomic number:   8
Symbol:   O
Atomic weight:   15.9994
Boiling Point (C):   -183
Melting Point (C):   -218.8
Density:   1.14
heatVapor:   .815
heatFusion:   0.053
Electrical Conductivity:   --
Thermal Conductivity:   6e-05
Specific Heat Capacity:   .218


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Analytical testing dots

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