Thulium

Tm Thulium Rare Earth

 

Atomic number:  69 Atomic weight:  168.93421
Shells:  2,8,18,31,8,2 Orbitals:  [Xe] 4f13 6s2
Melting point:  1545°C Boiling point:  1950°C
Covalent radius:  1.56 Å Atomic volume:  2.42 cm³/mol
Atomic radius:  2.42 Å Ionic radius:  1.09 (+3) Å
Electronegativity:  1.25 Oxidation states:  (3),2
1st ionization pot.:  6.1843 V 2nd ionization pot.:  12.054 V
3rd ionization pot.:  26.367 V Specific heat:  0.16 J/gK
Heat of fusion:  16.840 kJ/mol Heat of vapor.:  191.0 kJ/mol
Thermal conduct.:  0.168 W/cmK Electrical conduct.:  0.0150 10^6/cm ohm
Density:  9.33 g/cm³ Valence:  3