Tl
Thallium
81
Atomic Number: 81
Atomic mass: 204.38332
Ionization energy: 589
Electronaffinity: -19
Covalent radius: 148
Calculated radius: 156
Empirical radius: 190
Vanderwaals radius: 196
Electronegativity: 2.04
Density: 11.85
Oxidation states: 1, 3
Melting point: 577
Boiling point: 1746
Electron configuration: [Xe] 4f14 5d10 6s2 6p1
Element group: 13
Element period: 6

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