Properties | |
| Atomic Number: | 74 |
| Atomic Weight: | 183.85 |
| Electron Configuration (at ground state): | 1s22s22p63s23p63d104s24p64d104f145s25p65d46s2 |
| Oxidation States (Bold most stable): | +6, +5, +4, +3, +2 |
| Boiling Point (K): | 5825 |
| Melting Point (K): | 3695 |
| Density (at 300K -- g/cm3): | 19.3 |
| Atomic Volume (at 300K -- cm3/mol) | 9.53 |
| Number of stable isotopes: | 5 |
| Mass Number (Bold naturally occurring) -- Half-Life -- Disintigration Type: |
181 -- 140 days -- orbital electron capture 185 -- 75.1 days -- beta particle (electron) emission 188 -- 69 days -- beta particle (electron) emission |
| Covalent Radius (Å): | 1.30 |
| Atomic Radius (Å): | 1.41 |
| First Ionization Potential (V): | 7.98 |
| Electronegativity (Pauling's): | 2.36 |
| Specific Heat Capacity (at 300K -- J g-1 K-1): | 0.13 |
| Heat of Vaporization (kJ/mol): | 422.58 |
| Heat of Fusion (kJ/mol): | 35.40 |
Electrical Conductivity (at 293K for polycrystalline material -- 106  -1 cm-1): |
18.2 |
| Thermal Conductivity (at 300K -- W m-1 K-1): | 174 |
| Crystal Structure: |  Cubic, body centered |
| Acid-Base Properties: |  Slightly acidic |