Meitnerium vs Copernicium
| Property | Mt Meitnerium | Cn Copernicium |
|---|---|---|
| Atomic number | 109 | 112 |
| Symbol | Mt | Cn |
| Name | Meitnerium | Copernicium |
| Category | transition-metal | transition-metal |
| Standard Atomic Weight | 278 u | 285 u |
| Period | 7 | 7 |
| Group | 9 | 12 |
| Block | s | s |
| Phase at STP | N/A | gas |
| Electron configuration | [Rn]7s25f146d7(calculated) | [Rn] 7s2 5f14 6d10(predicted) |
| Oxidation states | [1, 3, 4, 6, 8, 9] | [2, 4] |
| Electronegativity (Pauling) | N/A | N/A |
| Electron affinity | 1.7 eV | -0.8 eV |
| Density | 3.740000e+4 kg/m³ | 1.400000e+4 kg/m³ |
| Melting point | -273.15 °C | -273.15 °C |
| Boiling point | -273.15 °C | -165.15 °C |
| Discovery year | 1982 | 1996 |