97Bk247.07031
Berkelium
Actinide
Solid at STP
Period 7Block FDiscovered 1949
[Rn]7s2 5f9
Berkelium is a transuranic radioactive chemical element with symbol Bk and atomic number 97. It is a member of the actinide and transuranium element series. It is named after the city of Berkeley, California, the location of the University of California Radiation Laboratory where it was discovered in December 1949.
📖 Read more on Wikipedia →Atomic Properties
| Atomic Number | 97 |
| Atomic Mass | 247.07031 u |
| Electron Configuration | [Rn]7s2 5f9 |
| Oxidation States | +4, +3 |
| Electronegativity | 1.3 (Pauling) |
| Atomic Radius | 244 pm |
| Ionization Energy | 6.23 eV |
| Block | F |
Physical Properties
| Appearance | silvery |
| Standard State | Solid |
| Melting Point | 1323 K (1049.8 °C) |
| Density | 14 g/cm³ |
| CPK Color | #8A4FE3 |
Classification
| Category | Actinide |
| Group Block | Actinide |
| Period | 7 |
| Block | F |
Discovery
| Year Discovered | 1949 |
| Discovered By | Lawrence Berkeley National Laboratory |
| Electron Shells | 2, 8, 18, 32, 27, 8, 2 |