Bohrium Element Facts

The chemical element bohrium is classed as a transition metal. It was discovered in 1981 by scientists at the GSI in Darmstadt, Germany.

Bohrium is named after Niels Bohr.
Niels Bohr

Bohrium is named after Niels Bohr, who was awarded the 1922 Nobel Prize in Physics for the investigation of the structure of atoms and of the radiation emanating from them.


Data Zone

Classification: Bohrium is a transition metal
Color: steel gray presumed
Atomic weight: (270), no stable isotopes
State: solid
Melting point:
Boiling point:
Electrons: 107
Protons: 107
Neutrons in most abundant isotope: 163
Electron shells: 2,8,18,32,32,13,2
Electron configuration: [Rn] 5f14 6d5 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 660 kJ mol-1 (est)
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 Bohrium

First claimed to have been produced in the USSR in 1976.

Definite synthesis achieved in 1981 at the GSI in Darmstadt, Germany.

Bohrium was named in honor of Niels Bohr.

Appearance and Characteristics

Harmful effects:

Bohrium is harmful due to its radioactivity.


A synthetically made radioactive element. Only a few atoms have ever been produced. Bohrium decays very rapidly through the emission of α-particles.

Uses of Bohrium

Bohrium’s only use is in research.

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: Bohrium is produced synthetically by cold fusion.

Isotopes: Bohrium has eleven isotopes whose half-lives are known; 260Bh, 261Bh, 262Bh 264Bh, 265Bh, 266Bh, 267Bh 270Bh, 271Bh, 272B and 274Bh. None are stable. The most stable isotope is 270Bh, with a half-life of 61 seconds.

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  1. Thanks for the heads up on the electron configuration data DC. We’ve corrected it now.