← Back to the periodic table
109
Mt
[278]
Meitnerium
Transition metals · Group 9 · Period 7
Atomic properties
| Atomic number | 109 |
|---|---|
| Symbol | Mt |
| Standard atomic weight | [278] |
| Classification | Transition metals |
| Group | 9 |
| Period | 7 |
| Block | d-block |
| Electron configuration | [Rn] 5f14 6d7 7s2 |
| Electronegativity (Pauling) | — |
| Common oxidation states | — |
Physical properties
| Phase at 20 °C | Solid |
|---|---|
| Density | 37.4 g/cm³ |
| Melting point | — |
| Boiling point | — |
| Discovered | 1982 |
| CAS number | — |