Roentgenium vs Copernicium
Pick up to 3 elements and see how they stack up.
| Property | Roentgenium | Copernicium |
|---|---|---|
| Atomic number | 111 | 112 |
| Atomic mass | 282 | 285 |
| Electronegativity | — | — |
| Melting point | — | — |
| Boiling point | — | — |
| Density | — | — |
| Atomic radius | — | — |
| Ionization energy | — | — |
| Discovered | 1994 | 1996 |
| Category | Unknown properties | Unknown properties |
| State at room temp. | Unknown | Unknown |
| Block | d | d |
| Group | 11 | 12 |
| Period | 7 | 7 |
| Valence electrons | 2 | 2 |
| Common charges | — | — |
| Electron configuration | [Rn] 5f14 6d9 7s2 | [Rn] 5f14 6d10 7s2 |