Thallium is a solid at standard room temperature. Thallium is a Transition Metal.
Atomic Number-81
Density-11.85 g/mL
Atomic Weight-204.383 amu
Melting Point-304 C
Boiling Point-1473 C
Atomic Radius-1.55 Covalent, 1.70 Radius of Metals
Ionization Potential-141 kcal/mol of atoms
Electronegativity-1.8
Electron Configuration-[Xe]4f14 5d10 6s2 6p
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