Attribute | Mendelevium × | Nobelium × |
---|---|---|
Atomic mass (u) | 258.09843 | 259.101 |
Standard state | Solid | Solid |
Oxidation states |
|
|
Electron configuration | [Rn]7s²5f¹³ | [Rn]7s²5f¹⁴ |
Ionization energy (eV) | 6.58 | 6.65 |
Electronegativity (pauling scale) | 1.3 | 1.3 |
Melting point (K) | 1100 | 1100 |
Atomic number | 101 | 102 |
1↑Group name | Actinide | Actinide |
Discovered (year) | 1955 | 1957 |
Symbol | Md | No |