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