Atomic NumberAtomic Number of Dubnium
Atomic Number of Dubnium is 105.
Chemical symbol for Dubnium is Db. Number of protons in Dubnium is 105. Atomic weight of Dubnium is 268 u or g/mol. Melting point of Dubnium is unknown and its the boiling point is unknown.
» Boiling Point » Melting Point » Discovery YearAbout Dubnium
This is a radioactive chemical element which was discovered in the early 1970s by two competing groups of scientists, one working in the US, in the University of California, and the other working in a small Russian town of Dubna, which is a neighborhood of Moscow. The latter location was taken as a source for the name of the element. Dubnium can be obtained in nuclear reactors by processing californium, so it does not occur naturally and has no biological importance. It is very toxic and dangerous, so it is used solely for scientific purposes and research.
Properties of Dubnium Element
| Atomic Number (Z) | 105 |
|---|---|
| Atomic Symbol | Db |
| Group | 5 |
| Period | 7 |
| Atomic Weight | 268 u |
| Density | 29.3 g/cm3 |
| Melting Point (K) | unknown |
| Melting Point (℃) | unknown |
| Boiling Point (K) | unknown |
| Boiling Point (℃) | unknown |
| Heat Capacity | |
| Abundance | 0 mg/kg |
| State at STP | |
| Occurrence | Synthetic |
| Description | Transition metal |
| Electronegativity (Pauling) χ | |
| Ionization Energy (eV) | |
| Atomic Radius | |
| Covalent Radius | |
| Valence Electrons | |
| Year of Discovery | 1967/70 |
| Discoverer | Flerow oder Ghiorso |