Berkelium
Berkelium General
| Name:Berkelium | Symbol:Bk |
| Type:Synthetic Metal | Atomic weight:247 |
| Density @ 293 K:14.79 g/cm3 | Atomic volume:16.7 cm3/mol |
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Discovered:
Berkelium was first produced at the University of California, Berkeley in December 1949 in a particle accelerator. |
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Berkelium States
| State (s, l, g):solid | |
| Melting point:1259.2 K (986 °C) | Boiling point: K ( °C) |
Berkelium 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:601 kJ mol-1 | 2nd ionization energy: kJ mol-1 |
| 3rd ionization energy: kJ mol-1 | Electron affinity: kJ mol-1 |
Berkelium Oxidation & Electrons
| Shells:2,8,18,32,27,8,2 | Electron configuration:[Rn] 5f9 7s2 |
| Minimum oxidation number:0 | Maximum oxidation number:4 |
| Min. common oxidation no.:0 | Max. common oxidation no.:3 |
| Electronegativity (Pauling Scale):1.3 | Polarizability volume:22.7 Å3 |
Berkelium Appearance & Characteristics
| Structure:hcp: hexagonal close packed | Color:silvery gray (assumed) |
| Hardness:mohs | |
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Harmful effects:
Radioactive |
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Characteristics:
Radioactive. Berkelium has only been produced in minute amounts. 249Bk (half-life 320 days) is produced in a nuclear reactor by beta decay of curium. Elemental berkelium is a silvery metal, easily soluble in dilute mineral acids, and readily oxidized by air or oxygen at elevated temperatures to form the oxide. Uses: no uses |
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Berkelium Reactions
| Reaction with air: | Reaction with 6 M HCl: |
| Reaction with 15 M HNO3: | Reaction with 6 M NaOH: |
Berkelium Compounds
| Oxide(s):BkO, BkO2, BkO3 | Chloride(s):BkCl3 |
| Hydride(s): |
Berkelium Radius
| Atomic radius:170 pm | Ionic radius (1+ ion):pm |
| Ionic radius (2+ ion):pm | Ionic radius (3+ ion):96 pm |
| Ionic radius (2- ion):pm | Ionic radius (1- ion):pm |
Berkelium Conductivity
| Thermal conductivity:10 W m-1 K-1 | Electrical conductivity:S cm-1 |
Berkelium Abundance & Isotopes
| Abundance earth's crust:0 parts per million by weight, 0 parts per million by moles | |
| Abundance solar system:0 parts per billion by weight, 0 parts per billion by moles | |
| Cost, pure:$ per 100g | |
| Cost, bulk:$ per 100g | |
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Source:
In the nuclear fuel cycle, 249Bk (half-life 320 days) is produced by beta decay of curium. |
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Isotopes:
12 isotpoes. 247Bk has the longest half life of 1380 years. |
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Berkelium Other
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Other:
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