PERIODIC ELEMENT
N (Nitrogen)

 



Atomic number : 7
Atomic mass : 14.0067 g.mol-1
Electronegativity according to Pauling : 3.0
Density : 21.25*10-3 g.cm-3 at 20 °C
Melting point : -210 °C
Boiling point : -195.8 °C
Vanderwaals radius : 0.092 nm
Ionic radius : 0.171 nm (-3) ; 0.011 nm (+5) ; 0.016 (+3)
Isotopes : 4
Electronic shell : [He] 2s22p3
Energy of first ionisation : 1402 kJ.mol-1
Energy of second ionisation : 2856 kJ.mol-1
Energy of third ionisation : 4578 kJ.mol-1
Discovered by : Rutherford in 1772
 
Atomic Structure Uses (forms most of atmosphere)