Tl81 – Thallium

• Atomic Number: 81
• Atomic Symbol: Tl
• Atomic Name: Thallium
• Atomic Mass: 204.383
• CPK Hex Color: A6544D
• Electron Configuration: [Xe]6s2 4f14 5d10 6p1
• Electron Negativity: 1.62
• Atomic Radius: 196
• Ionization Energy: 6.108
• Electron Affinity: 0.2
• Oxidation States: +3, +1
• Standard State: Solid
• Melting Point: 577
• Boiling Point: 1746
• Density: 11.8
• Group Block: Post-transition metal
• Year Discovered: 1861

Periodic Table of Elements. (2022, December 23). In PubChem and the National Library of Medicine. https://pubchem.ncbi.nlm.nih.gov/periodic-table/#view=table