97 - Berkelium actinide
Discovered by Lawrence Berkeley Laboratory in 1949
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.
Periodic table
| Shell | Electrons | Orbitals |
|---|---|---|
| 1 | 2 | 2 in 1s |
| 2 | 8 | 2 in 2s + 6 in 2p |
| 3 | 18 | 2 in 3s + 6 in 3p + 10 in 3d |
| 4 | 32 | 2 in 4s + 6 in 4p + 10 in 4d + 14 in 4f |
| 5 | 27 | 2 in 5s + 6 in 5p + 10 in 5d + 9 in 5f |
| 6 | 8 | 2 in 6s + 6 in 6p |
| 7 | 2 | 2 in 7s |
Electron shells
silvery Appearance
247 u Atomic Mass
983 K Boiling Point
11 Group
3 Common Oxidation States
14.8 g/cm³ Density
−165 kJ/mol Electron Affinity
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f9 Electron Configuration
[Rn] 5f9 7s2 Electron Configuration (semantic)
1.3 Electronegativity
97 Electrons
6.2 eV First Ionization Energy
601 kJ/mol Ionization Energies
1.26k K Melting Point
40 Mendeleev Number
7 Number of Shells
150 Neutrons
97 Atomic Number
83 Number of Isotopes
3, 4 Oxidation States
7 Period
Solid Phase
97 Protons
2, 8, 18, 32, 27, 8, 2 Electron Shell Occupations