Attribute | Einsteinium × | Californium × |
---|---|---|
Standard state | Solid | Solid |
1↑Electron configuration | [Rn]7s²5f¹¹ | [Rn]7s²5f¹⁰ |
Atomic mass (u) | 252.083 | 251.07959 |
Electronegativity (pauling scale) | 1.3 | 1.3 |
Oxidation states |
|
|
Ionization energy (eV) | 6.42 | 6.3 |
Atomic radius (van der waals) (pm) | 245 | 245 |
Melting point (K) | 1133 | 1173 |
Atomic number | 99 | 98 |
Group name | Actinide | Actinide |
Discovered (year) | 1952 | 1950 |
Symbol | Es | Cf |