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Thallium

(Tl)

Category

Post-transition metal

Relative atomic mass

204.3833

Density

11.85

Melting point (°C)

303

Boiling point (°C)

1457

Electronegativity (Pauling)

1.6

Discovery year

1861

Discovered by

Claude-Nicolas Dubois

created by @lukaswyss

Thallium (Tl) – Element 81