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105
Db
[268]
Dubnium
Transition metals · Group 5 · Period 7
Atomic properties
| Atomic number | 105 |
|---|---|
| Symbol | Db |
| Standard atomic weight | [268] |
| Classification | Transition metals |
| Group | 5 |
| Period | 7 |
| Block | d-block |
| Electron configuration | [Rn] 5f14 6d3 7s2 |
| Electronegativity (Pauling) | — |
| Common oxidation states | +5 |
Physical properties
| Phase at 20 °C | Solid |
|---|---|
| Density | 29.3 g/cm³ |
| Melting point | — |
| Boiling point | — |
| Discovered | 1967 |
| CAS number | — |