PERIODIC ELEMENT
Nb (Niobium)

 



Atomic number : 41
Atomic mass : 92.91 g.mol-1
Electronegativity according to Pauling : unknown
Density : 8.4 g.cm-3 at 20 °C
Melting point : 2410 °C
Boiling point : 5100 °C
Vanderwaals radius : 0.143 nm
Ionic radius : 0.070 nm (+5) ; 0.069 (+4) nm
Isotopes : 14
Electronic shell : [Kr] 4d45s1
Energy of first ionisation : 652 kJ.mol-1
Discovered by : Charles Hatchett 1801
 
Atomic Structure Uses (No uses known )