Hassium vs Meitnerium
Pick up to 3 elements and see how they stack up.
| Property | Hassium | Meitnerium |
|---|---|---|
| Atomic number | 108 | 109 |
| Atomic mass | 277 | 278 |
| Electronegativity | — | — |
| Melting point | — | — |
| Boiling point | — | — |
| Density | — | — |
| Atomic radius | — | — |
| Ionization energy | — | — |
| Discovered | 1984 | 1982 |
| Category | Transition metal | Unknown properties |
| State at room temp. | Unknown | Unknown |
| Block | d | d |
| Group | 8 | 9 |
| Period | 7 | 7 |
| Valence electrons | 2 | 2 |
| Common charges | +2, +3, +4, +5, +6, +8 | — |
| Electron configuration | [Rn] 5f14 6d6 7s2 | [Rn] 5f14 6d7 7s2 |