Comparison of Rutherfordium and Dubnium [S]ave
| Attribute |  Dubnium × | Rutherfordium × |
|---|---|---|
| Discovered (year) | 1967 | 1964 |
| Atomic number | 105 | 104 |
| Group name | Transition metal | Transition metal |
| Oxidation states |
|
|
| Electron configuration | [Rn]7s²5f¹⁴6d³ | [Rn]7s²5f¹⁴6d² |
| Atomic mass (u) | 268.126 | 267.122 |
| Standard state | Solid | Solid |
| Symbol | Db | Rf |
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