|
105
Db
(268)
|
Dubnium is radioactive.
| Classification: | Dubnium is a transition metal |
| Color: | |
| Atomic weight: | 268, no stable isotopes |
| State: | solid (presumed) |
| Melting point: | |
| Boiling point: | |
| Shells: | 2,8,18,32,32,11,2 |
| Electron configuration: | [Rn] 5f14 6d3 7s2 |
| Density @ 20oC: | |
| Atomic volume: | |
| Structure: | |
| Hardness: |
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 & 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.
Dubnium is of research interest only.
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 & 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.
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.
Energies
Specific heat capacity: J g-1 K-1
Heat of fusion: kJ mol-1
1st ionization energy: kJ mol-1
3rd ionization energy: kJ mol-1
Heat of fusion: kJ mol-1
1st ionization energy: kJ mol-1
3rd ionization energy: kJ mol-1
Heat of atomization: kJ mol-1
Heat of vaporization : kJ mol-1
2nd ionization energy: kJ mol-1
Electron affinity: kJ mol-1
Heat of vaporization : kJ mol-1
2nd ionization energy: kJ mol-1
Electron affinity: kJ mol-1
Oxidation & Electrons
Shells: 2,8,18,32,32,11,2
Minimum oxidation number:
Min. common oxidation no.:
Electronegativity (Pauling Scale):
Minimum oxidation number:
Min. common oxidation no.:
Electronegativity (Pauling Scale):
Electron configuration: [Rn] 5f14 6d3 7s2
Maximum oxidation number:
Max. common oxidation no.:
Polarizability volume: Å3
Maximum oxidation number:
Max. common oxidation no.:
Polarizability volume: Å3
Reactions & Compounds
Reaction with air:
Reaction with 15 M HNO3:
Oxide(s):
Hydride(s):
Reaction with 15 M HNO3:
Oxide(s):
Hydride(s):
Reaction with 6 M HCl:
Reaction with 6 M NaOH:
Chloride(s):
Reaction with 6 M NaOH:
Chloride(s):
Radius
Atomic radius: pm
Ionic radius (2+ ion): pm
Ionic radius (2- ion): pm
Ionic radius (2+ ion): pm
Ionic radius (2- ion): pm
Ionic radius (1+ ion): pm
Ionic radius (3+ ion): pm
Ionic radius (1- ion): pm
Ionic radius (3+ ion): pm
Ionic radius (1- ion): pm
Conductivity
Thermal conductivity: W m-1 K-1
Electrical conductivity: x 106 S m-1
References
1.
Cite this Page
For online linking, please copy and paste one of the following:
<a href="http://www.chemicool.com/elements/dubnium.html">Dubnium</a>or
<a href="http://www.chemicool.com/elements/dubnium.html">Dubnium Element Facts</a>To cite this page in an academic document, please use the following MLA compliant citation:
"Dubnium." Chemicool Periodic Table. Chemicool.com. 10 June 2011. Web. <http://www.chemicool.com/elements/dubnium.html>.