Dubnium is radioactive.
Data Zone
| Classification: | Dubnium is a transition metal |
| Color: | |
| Atomic weight: | 268, no stable isotopes |
| State: | solid (presumed) |
| Melting point: | |
| Boiling point: | |
| Electrons: | 105 |
| Protons: | 105 |
| Neutrons in most abundant isotope: | 163 |
| Electron shells: | 2,8,18,32,32,11,2 |
| Electron configuration: | [Rn] 5f14 6d3 7s2 |
| Density @ 20oC: |
| Atomic volume: | – |
| Structure: | - |
| Hardness: | – |
| Specific heat capacity | – |
| Heat of fusion | – |
| Heat of atomization | – |
| Heat of vaporization | – |
| 1st ionization energy | – |
| 2nd ionization energy | – |
| 3rd ionization energy | – |
| Electron affinity | – |
| Minimum oxidation number | – |
| Min. common oxidation no. | – |
| Maximum oxidation number | – |
| Max. common oxidation no. | – |
| Electronegativity (Pauling Scale) | – |
| Polarizability volume | – |
| Reaction with air | – |
| Reaction with 15 M HNO3 | – |
| Reaction with 6 M HCl | - |
| Reaction with 6 M NaOH | – |
| Oxide(s) | - |
| Hydride(s) | – |
| Chloride(s) | – |
| Atomic radius | – |
| Ionic radius (1+ ion) | – |
| Ionic radius (2+ ion) | – |
| Ionic radius (3+ ion) | – |
| Ionic radius (1- ion) | – |
| Ionic radius (2- ion) | – |
| Ionic radius (3- ion) | – |
| Thermal conductivity | – |
| Electrical conductivity | – |
| Freezing/Melting point: | – |
Discovery of Dubnium
Credit for the discovery of dubinium in 1967 is shared between teams of scientists at the Joint Institute for Nuclear Research at Dubna, Russia and scientists at Lawrence Berkeley National Laboratory, California.
The element was named after the research facility in Russia where it was synthesized.
Appearance and Characteristics
Harmful effects:
Dubnium is harmful due to its radioactivity.
Characteristics:
Dubnium is a radioactive synthetic metal and has only been produced in tiny amounts.
Uses of Dubnium
Dubnium is of research interest only.
Abundance and Isotopes
Abundance earth’s crust: nil
Abundance solar system: parts per billion by weight, parts per trillion by moles
Cost, pure: $ per 100g
Cost, bulk: $ per 100g
Source: Dubnium is a synthetic radioactive metal, created by nuclear bombardment, and has only been produced in tiny amounts. Dubnium is made by bombarding californium-249 with nitrogen. It can also be produced by bombarding americium-243 with neon.
Isotopes: Dubnium has 12 isotopes whose half-lives are known, with mass numbers from 256 to 270. None are stable. The most stable isotope is 268Db, with a half-life of 32 hours.
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