Bh
Bohrium
BOHRIUM
TRANSITION ELEMENT: MANGANESE GROUP
| Atomic number: | 107 |
| Group numbers: | 7 |
| Period: | 7 |
| Electronic configuration: | [Rn] 5f14 6d5 7s2 |
| Formal oxidation number: | |
| Electronegativities: | - |
| Atomic radius / pm: | - |
| Relative atomic mass: | - |
Bohrium was discovered by Peter Armbruster, Gottfried Münzenber (DE) and their co-workers at the Heavy Ion Research Laboratory (Gesellschaft für Schwerionenforschung, GSI) in Darmstadt, Germany in 1981. Named in honour of Niels Bohr, the Danish physicist. It is a synthetic radioactive metal. Bohrium was produced by bombarding bismuth-204 with chromium-54.
| Density / g dm-3: | - | |
| Molar volume / cm3mol-1: | - | |
| Electrical resistivity / µΩcm: | - | (20 °C) |
| Thermal conductivity / W m-1K-1: | - |
| Melting point / °C: | - |
| Boiling point / °C: | - |
| Heat of fusion / kJ mol-1: | - |
| Heat of vaporization / kJ mol-1: | - |
| Heat of atomization / kJ mol-1: | - |
| First ionization energy / kJ mol-1: | - |
| Second ionization energy / kJ mol-1: | - |
| Third ionization energy / kJ mol-1: | - |
| in the atmosphere / ppm: | - |
| in the Earth's crust / ppm: | - |
| in the oceans / ppm: | - |
| Crystal structure: | unknown structure |
| Unit-cell dimensions / pm: | - |
| Space group: | - |
| Isotope | Relative atomic mass | Mass percent (%) |
|---|---|---|
| 270Bh | 270.133(2) | * |
| 274Bh | 274.144(4) | * |
| Balanced half-reaction | Eo / V | |
|---|---|---|
| 106 Seaborgium | ← | 107 Bohrium | → | 108 Hassium |
Citing this page:
Generalic, Eni. "Bohrium." EniG. Periodic Table of the Elements. KTF-Split, 13 Feb. 2025. Web. {Date of access}. <https://www.periodni.com/bh.html>.
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