Attribute | Californium × | Mendelevium × |
---|---|---|
Standard state | Solid | Solid |
Electron configuration | [Rn]7s²5f¹⁰ | [Rn]7s²5f¹³ |
Atomic mass (u) | 251.07959 | 258.09843 |
Electronegativity (pauling scale) | 1.3 | 1.3 |
Oxidation states |
|
|
Ionization energy (eV) | 6.3 | 6.58 |
Atomic radius (van der waals) (pm) | 245 | - |
Melting point (K) | 1173 | 1100 |
Atomic number | 98 | 101 |
1↑Group name | Actinide | Actinide |
Symbol | Cf | Md |
Discovered (year) | 1950 | 1955 |