Electron Configuration

[Xe] 6s2 4f14 5d10 6p1

Thallium means "green branch"
Melting Point: 303.85 oC
Boiling Point: 1472.85 oC
Heat of Vaporization: 812.2 J/g
Heat of Fusion: 21.09 J/g
Specific Heat Capacity: 0.129 J/g . Co or 0.03 cal/g . Co
Density: 11.85 g/cm3