Discovered By: Joseph Priestley
Discovery year: 1774

The following table showing some properties of Oxygen(O):

Table Example
Symbol O
Atomic number 8
Atomic weight 15.999
Group 16
Period 2
Block p
Electrons 8
Protons 8
Neutrons 8
Oxidation states 2, -1, +1, +2


Table Example
Electrons per shell K2 L6
Electron configuration 1s^2 2s^2 2p^4
Gas atomic multiplies 2
Atomic radius 48 pm
Covalent radius 66 pm
van der Waalsradius 152 pm
Boiling point -182.9°C
Melting point -218.3°C
Phase Gas
Fusion heat 0.222kJ.mol^-1


Table Example
Specific heat 919 J.kg^-1.k^-1
Vaporization heat 3.41 kJ,mol^-1
Color Colorless
Density 1.429 kg.m^-3
Refractive index 1.000271
Sound speed 317.5 m.s^-1
Thermal conductivity 0.02658W.m^-1.K^-1
Magnetic type Paramagnetic
Valence 2
Radioactive No
Electronegativity 3.44