Nobelium vs Meitnerium
| Property | No Nobelium | Mt Meitnerium |
|---|---|---|
| Atomic number | 102 | 109 |
| Symbol | No | Mt |
| Name | Nobelium | Meitnerium |
| Category | actinide | transition-metal |
| Standard Atomic Weight | 259 u | 278 u |
| Period | 7 | 7 |
| Group | N/A | 9 |
| Block | s | s |
| Phase at STP | solid | N/A |
| Electron configuration | [Rn]7s25f14 | [Rn]7s25f146d7(calculated) |
| Oxidation states | [2, 3] | [1, 3, 4, 6, 8, 9] |
| Electronegativity (Pauling) | 1.3 | N/A |
| Electron affinity | -2.36 eV | 1.7 eV |
| Density | 9900 kg/m³ | 3.740000e+4 kg/m³ |
| Melting point | 826.85 °C | -273.15 °C |
| Boiling point | -273.15 °C | -273.15 °C |
| Discovery year | 1957 | 1982 |