Dubnium Element Facts

Dubnium Radioactive

Dubnium is radioactive.


Data Zone

Classification: Dubnium is a transition metal
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:
Show more, including: Heats, Energies, Oxidation, Reactions, Compounds, Radii, Conductivities
Atomic volume:
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
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.


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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