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Thallium

Symbol: Tl
Atomic Mass/Weight: 204.37 AMU
Atomic Number: 81
Oxidation State (Bold Most Stable):  +1,+3
Melting Point: 577 K
Boiling Point: 1746 K
# of Isotopes: 2
Electron Configuration: [Xe] 4f14 5d10 6s2 6p1
Lewis Dot Diagram:
Thallium - Lewis Dot Diagram