Attribute | Mendelevium × | Lawrencium × |
---|---|---|
Atomic mass (u) | 258.09843 | 266.12 |
Standard state | Solid | Solid |
Oxidation states |
|
|
Electron configuration | [Rn]7s²5f¹³ | [Rn]7s²5f¹⁴6d¹ |
Ionization energy (eV) | 6.58 | - |
1↓Electronegativity (pauling scale) | 1.3 | 1.3 |
Melting point (K) | 1100 | 1900 |
Atomic number | 101 | 103 |
Group name | Actinide | Actinide |
Symbol | Md | Lr |
Discovered (year) | 1955 | 1961 |