Quick answerMeitnerium (Mt) is a transition metal with atomic number 109 and a mass number of 278 (the most stable isotope), in group 9, period 7. It was discovered by Gottfried Münzenberg and colleagues in 1982. It is used for superheavy element research and studying transactinide chemistry. Its electron configuration is [Rn] 5f14 6d7 7s2 (predicted).
Meitnerium is a synthetic element named for Lise Meitner, whose work unlocked nuclear fission and changed physics.
Key facts
| Symbol | Mt |
|---|---|
| Atomic number | 109 |
| Atomic mass | [278] — mass number of the most stable isotope |
| Category | transition metal |
| Group | 9 |
| Period | 7 |
| Block | d-block |
| Electron configuration | [Rn] 5f14 6d7 7s2 predicted |
| Discovered | Gottfried Münzenberg and colleagues, 1982 |
| Uses | superheavy element research, studying transactinide chemistry |
Quick quiz
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Keep exploring
- Periodic table — all 118 elements
- Gold (Au) — another transition metal, atomic number 79
- Mercury (Hg) — another transition metal, atomic number 80
- Rutherfordium (Rf) — another transition metal, atomic number 104
- Dubnium (Db) — another transition metal, atomic number 105
- Seaborgium (Sg) — another transition metal, atomic number 106
- Bohrium (Bh) — another transition metal, atomic number 107
- Hassium (Hs) — another transition metal, atomic number 108
- Darmstadtium (Ds) — another transition metal, atomic number 110
- Roentgenium (Rg) — another transition metal, atomic number 111
- Copernicium (Cn) — another transition metal, atomic number 112
- All transition metal elements — on the periodic table
Sources & last updated
- CIAAW — Standard Atomic Weights
- PubChem Periodic Table
- Wikipedia — Timeline of chemical element discoveries
- Wikipedia — Meitnerium
Last updated: . Figures are shown with their year; where sources disagree, the value is left out rather than estimated.