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69
  Tm  
168.934210
Thulium
      


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Name: Thulium
Symbol: Tm
Atomic Number: 69
AtomicWeight: 168.934210
Family: Lanthanides
CAS RN: 7440-30-4
Description: A silvery-grey, soft, malleable, and ductile rare earth metal
State (25 °C): Solid
Melting Point: 1818 °K
Boiling Point: 2223 °K
Density: 9.321 g/cm3
Oxidation states: +3
Electron Configuration: [Xe] 4f136s2
Radius: 175 pm (Covalent)
Electronegativity: 1.25 (Pauling Scale)

1st Ionization Energy: 597 KJ/mole
2nd Ionization Energy: 1160 KJ/mole
3rd Ionization Energy: 2285 KJ/mole

      



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