Atomic Radii
Atomic Radius
Bohr Radius
Covalent Radius
Van der Waals
| Thallium | |
| Electron Configuration | 2,8,18,32,18,3 |
| Electron Configuration | [Xe]] 4f14 5d10 6s2 6p1 |
| Electronegativity | 1.62 |
| Enthalpy of Fusion | 4.31 kJ mol-1 |
| Enthalpy of Vaporisation | 166.1 kJ mol-1 |
| Heat Capacity | 26.32 J mol-1 K-1 |
| Thermal Conductivity | 46.1 W m-1 K-1 |
| Thermal Expansion | 29.9 μm m-1 K-1 |
| Magnetic ordering | No data |
| Electrical resistivity | 0.18 Ω m |
| Speed of sound | 818 m s-1 |
| Young's modulus | 8 GPa |
| Shear modulus | 818 GPa |
| Bulk modulus | 43 GPa |
| Poisson ratio | 0.45 |
| Mohs hardness | 1.2 |
| Brinell hardness | 26.4 MPa |
| Atomic Radii |
|
| Atomic Radius
|
190 pm |
| Bohr Radius
|
156 pm |
| Covalent Radius
|
148 pm |
| Van der Waals
|
196 pm |
| Oxidation States |
|
| Main
|
Tl+1 |
| Other
|
Tl+3 |
Ionisation Energies (kJ mol-1)  |
|
| M - M+ |
589.3 |
| M+ - M2+ |
1971 |
| M2+ - M3+ |
2878 |
| M3+ - M4+ |
4900 |
| M4+ - M5+ |
6100 |
| M5+ - M6+ |
8300 |
| M6+ - M7+ |
9500 |
| M7+ - M8+ |
11300 |
| M8+ - M9+ |
1400 |
| M9+ - M10+ |
16000 |
| Covalent Bonds (kJ mol-1) |
|
| Tl+1-H
|
185 |
| Tl+3-C
|
125 |
| Tl+3-O
|
375 |
| Tl+3-F
|
460 |
| Tl+3-Cl
|
368 |
| Tl-Tl
|
63 |