Bk
Berkelium
BERKELIUM
TRANSITION ELEMENT: ACTINIDE
| Atomic number: | 97 |
| Group numbers: | 3 |
| Period: | 7 |
| Electronic configuration: | [Rn] 5f9 7s2 |
| Formal oxidation number: | +3 +4 |
| Electronegativities: | - |
| Atomic radius / pm: | 170 |
| Relative atomic mass: | - |
Berkelium was discovered by Stanley G. Thompson, Albert Ghiorso, and Glenn T. Seaborg (US) in 1949. Named after Berkeley, a city in California, home of the University of California, USA. It is synthetic radioactive metal. Berkelium was made by bombarding americium with alpha particles.
| Density / g dm-3: | 14790 | (calc.) |
| Molar volume / cm3mol-1: | 16.70 | (calc.) |
| Electrical resistivity / µΩcm: | - | (20 °C) |
| Thermal conductivity / W m-1K-1: | - |
| Melting point / °C: | 1050 |
| Boiling point / °C: | - |
| Heat of fusion / kJ mol-1: | - |
| Heat of vaporization / kJ mol-1: | - |
| Heat of atomization / kJ mol-1: | 291 |
| First ionization energy / kJ mol-1: | 601.11 |
| 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: | hexagonal |
| Unit-cell dimensions / pm: | - |
| Space group: | - |
| Isotope | Relative atomic mass | Mass percent (%) |
|---|---|---|
| 247Bk | 247.070 31(4) | * |
| 249Bk | 249.074 99(2) | * |
| Balanced half-reaction | Eo / V | |
|---|---|---|
| 96 Curium | ← | 97 Berkelium | → | 98 Californium |
Citing this page:
Generalic, Eni. "Berkelium." EniG. Periodic Table of the Elements. KTF-Split, 13 Feb. 2025. Web. {Date of access}. <https://www.periodni.com/bk.html>.
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