PERIODIC ELEMENT
Tb (Terbium)

 



Atomic number : 65
Atomic mass : 158.92 g mol-1
Electronegativity according to Pauling : 1.2
Density : 8.3 g.cm-3 at 20 °C
Melting point : 1360 °C
Boiling point : 3041 °C
Vanderwaals radius : unknown
Ionic radius : unknown
Isotopes : 9
Electronic shell : [ Xe ] 4f9 6s2
Energy of first ionisation : 563.5  kJ.mol-1
Energy of second ionisation : 1109.6 kJ.mol-1
Standard potential : - 2.39 V
Discovered by : Carl Mosander in 1843
 
Atomic Structure Uses (in color TV's)