Chemical Elements.com - Thallium (Tl)

“Basic Information Name: Thallium Symbol: Tl Atomic Number: 81 Atomic Mass: 204.3833 amu Melting Point: 303.5 °C (576.65 K, 578.3 °F) Boiling Point: 1457.0 °C (1730.15 K, 2654.6 °F) Number of Protons/Electrons: 81 Number of Neutrons: 123 Classification: Other Metals Crystal Structure: Hexagonal...” (from the page’s text)

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