The chemical element bohrium is classed as a transition metal. It was discovered in 1981 by scientists at the GSI in Darmstadt, Germany.
|Classification:||Bohrium is a transition metal|
|Color:||steel gray presumed|
|Atomic weight:||(270), no stable isotopes|
|Neutrons in most abundant isotope:||163|
|Electron configuration:||[Rn] 5f14 6d5 7s2|
|Density @ 20oC:|
Compounds, Radii, Conductivities
|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||–|
|Minimum oxidation number||–|
|Min. common oxidation no.||–|
|Maximum oxidation number||–|
|Max. common oxidation no.||–|
|Electronegativity (Pauling Scale)||–|
|Reaction with air||–|
|Reaction with 15 M HNO3||–|
|Reaction with 6 M HCl||–|
|Reaction with 6 M NaOH||–|
|Ionic radius (1+ ion)||–|
|Ionic radius (2+ ion)||–|
|Ionic radius (3+ ion)||–|
|Ionic radius (1- ion)||–|
|Ionic radius (2- ion)||–|
|Ionic radius (3- ion)||–|
Discovery of Bohrium
Bohrium was first claimed to have been produced in the USSR in 1976.
A verified, definite synthesis achieved in 1981 at the GSI in Darmstadt, Germany.
Bohrium was named in honor of Niels Bohr, the pioneer of quantum mechanics.
Appearance and Characteristics
Bohrium is harmful due to its radioactivity.
Bohrium is 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 of these isotopes are stable: the most stable is 270Bh, with a half-life of 61 seconds.
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