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Chemical element: Thallium (Tl)
| Atomic Number: | 81 |
| Element Symbol: | Tl |
| Element Name: | Thallium |
| Atomic Weight: | 204.3833 |
| Group Number: | 13 |
| Group Name: | none |
| Period Number: | 6 |
| Block: | p-block |
| Ground State Configuration: | [Xe] 4f14 5d10 6s2 6p |
| Ground State Level: | 2Po1/2 |
| Standard State: | Solid |
| Common Valences: | 1,3 |
| Bond Length: | 340.8 |
| Atomic Radius Empirical: | 190 |
| Atomic Radius Calculated: | 156 |
| Covalent Radius Empirical: | 148 |
| Vander Waals Radius: | 196 |
| Electron Affinity: | 19.2 |
| First Ionization Energy: | 589.4 |
| Pauling Electronegativity: | 1.62 |
| Sanderson Electronegativity: | 2.25 |
| Allred Rochow Electronegativity: | 1.44 |
| Mulliken Jaffe Electronegativity: | 1.96 |
| Density Of Solid: | 11850 |
| Molar Volume: | 17.22 |
| Velocity Of Sound: | 818 |
| Youngs Modulus: | 8 |
| Rigidity Modulus: | 2.8 |
| Bulk Modulus: | 43 |
| Poissons Ratio: | 0.45 |
| Mineral Hardness: | 1.2 |
| Brinell Hardness: | 26.4 |
| Electrical Resistivity: | 15 |
| Melting Point: | 304 |
| Boiling Point: | 1473 |
| Superconduction Temperature: | -270.77 |
| Thermal Conductivity: | 46 |
| Coefficient Of Linear Expansion: | 29.9 |
| Enthalpy Of Fusion: | 4.2 |
| Enthalpy Of Vaporization: | 165 |
| Enthalpy Of Atmization: | 182 |
| Most Common Oxidation Numbers: | 3,1 |
| Color: | Silvery white |
| Classification: | Metallic |
| Discovered By: | Sir William Crookes |
| Discovered At: | England |
| Discovered When: | 1861 |
| Origin Of Name: | From the Greek word thallos meaning green twig or green shoot |
Calculate the molecular weight of Thallium or molecular weight Tl.
Also see the full list of chemical elements and atomic weights.
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