Hassium vs Meitnerium
| Property | Hs Hassium | Mt Meitnerium |
|---|---|---|
| Atomic number | 108 | 109 |
| Symbol | Hs | Mt |
| Name | Hassium | Meitnerium |
| Category | transition-metal | transition-metal |
| Standard Atomic Weight | 270 u | 278 u |
| Period | 7 | 7 |
| Group | 8 | 9 |
| Block | s | s |
| Phase at STP | N/A | N/A |
| Electron configuration | [Rn]7s25f146d6 | [Rn]7s25f146d7(calculated) |
| Oxidation states | [3, 4, 6, 8] | [1, 3, 4, 6, 8, 9] |
| Electronegativity (Pauling) | N/A | N/A |
| Electron affinity | 1.1 eV | 1.7 eV |
| Density | 4.070000e+4 kg/m³ | 3.740000e+4 kg/m³ |
| Melting point | -273.15 °C | -273.15 °C |
| Boiling point | -273.15 °C | -273.15 °C |
| Discovery year | 1984 | 1982 |