Tm
Thulium
69
Atomic Number: 69
Atomic mass: 168.934212
Ionization energy: 597
Electronaffinity: -50
Covalent radius:
Calculated radius: 222
Empirical radius: 175
Vanderwaals radius:
Electronegativity: 1.25
Density: 9.32
Oxidation states: 2, 3
Melting point: 1818
Boiling point: 2223
Electron configuration: [Xe] 4f13 6s2
Element group: 16
Element period: 8

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