PERIODIC ELEMENT
Ne (Neon)

 



Atomic number : 10
Atomic mass : 20.179 g.mol-1
Electronegativity according to Pauling : unknown
Density : 0.9*10-3 g.cm-3 at 20 °C
Melting point : - 249 °C
Boiling point : - 246 °C
Vanderwaals radius : 0.16 nm
Ionic radius : unknown
Isotopes : 3
Electronic shell : [He]2s22p6
Energy of first ionisation : 2080 kJ.mol-1
Energy of second ionisation : 3952 kJ.mol-1
Energy of third ionisation : 6122 kJ.mol-1
Discovered by : Sir Ramsay in 1898
 
Atomic Structure Uses (lighting)