Periodic Table Of The Elements

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Atomic Number: 81
Symbol: Tl
Name: Thallium
Group: 13
Period: 6
Weight: 204.3833(2)
Density: 11.85
Melting Point: 577.15
Boiling Point: 1746
Specific Heat Capacity: 0.129
Electronegativity: 1.62
Abundance: 0.85