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General
States Energies Oxidation & Electrons Appearance & Characteristics Reactions Compounds Radius Conductivity Abundance & Isotopes |
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Bohrium is Radioactive. |
General:
| Name: Bohrium | Symbol: Bh |
| Type: Transition metal | Atomic weight: 262.12 |
| Density @ 293 K: 37 g/cm3 (est) | Atomic volume: cm3/mol |
| Discovered: First produced in the USSR in 1976, verified in 1981 at the GSI in Darmstadt, Germany. | |
States
| State (s, l, g): solid | |
| Melting point: ) no data | Boiling point: no data |
Energies
| Specific heat capacity: J g-1 K-1 | Heat of atomization: kJ mol-1 |
| Heat of fusion: kJ mol-1 | Heat of vaporization: kJ mol-1 |
| 1st ionization energy: 660 kJ mol-1 (est) | 2nd ionization energy: kJ mol-1 |
| 3rd ionization energy: kJ mol-1 | Electron affinity: kJ mol-1 |
Oxidation & Electrons
| Shells: 2,8,18,32,32,13,2 | Electron configuration: [Rn] 5f14 6d2 7s2 |
| Minimum oxidation number: | Maximum oxidation number: |
| Min. common oxidation no.: | Max. common oxidation no.: |
| Electronegativity (Pauling Scale): | Polarizability volume: Å3 |
Appearance & Characteristics
| Structure: unknown | Color: steel gray (est) |
| Uses: Research interest only | Hardness: mohs |
| Harmful effects: radioactive | |
| Characteristics:A synthetically made radioactive element. Only a few atoms have ever been produced. Bohrium decays very rapidly through the emission of α-particles. | |
Reactions
| Reaction with air: | Reaction with 6 M HCl: |
| Reaction with 15 M HNO3: | Reaction with 6 M NaOH: |
Compounds
| Oxide(s): | Chloride(s): |
| Hydride(s): |
Radius
| Atomic radius: pm | Ionic radius (1+ ion): pm |
| Ionic radius (2+ ion): pm | Ionic radius (3+ ion): pm |
| Ionic radius (2- ion): pm | Ionic radius (1- ion): pm |
Conductivity
| Thermal conductivity: W m-1 K-1 | Electrical conductivity: S cm-1 |
Abundance & Isotopes
| Abundance earth's crust: none | |
| Abundance solar system: | |
| Cost, pure: $ per 100g | |
| Cost, bulk: $ per 100g | |
| Source: Bohrium is produced synthetically by cold fusion. | |
| Isotopes:Bohrium has three isotopes whose half-lives are known; 261Bh, 262Bh and 264Bh. | |
