105Db268
Dubnium
Transition metal · element 105 · group 5, period 7
Quick facts
| Symbol | Db |
|---|---|
| Atomic number | 105 |
| Relative atomic mass | 268 |
| Category | Transition metal |
| Position | group 5, period 7 |
| State at 20 °C | Unknown (too few atoms have been made) |
| Melting point | — |
| Boiling point | — |
| Density | — |
| Electronegativity | — |
| Electron configuration | [Rn] 5f14 6d3 7s2 |
About Dubnium
Dubnium has the symbol Db and atomic number 105, which means every dubnium atom has 105 protons in its nucleus and, in a neutral atom, 105 electrons. At room temperature it is unknown (too few atoms have been made).
Transition metals sit in the middle block of the periodic table. They are usually hard, dense and strong, often form coloured compounds, can have more than one ion charge, and many are useful catalysts.
Explore it
See where dubnium sits, and drag the temperature slider to watch it melt and boil, on the interactive periodic table. Practise with quizzes on OmniEx.