Meitnerium (Mt) — Element 109: Properties & Data | Aladdin Scientific
Meitnerium(Mt) — Element 109
Meitnerium (Mt) is a transition metal with atomic number 109 and atomic mass 277.154. It sits in group 9 and period 7 of the periodic table and was discovered in 1982.
Key facts
| Atomic mass | 277.1540 u |
|---|---|
| Electron configuration | [Rn]7s2 5f14 6d7 (calculated) |
| Oxidation states | 9, 8, 6, 4, 3, 1 |
| Standard state | Solid |
| Year discovered | 1982 |
Frequently asked questions
What is the electron configuration of meitnerium?
The ground-state electron configuration of meitnerium is [Rn]7s2 5f14 6d7 (calculated).
What group and period is meitnerium in?
Meitnerium (Mt) is in group 9 and period 7 of the periodic table, classified as a transition metal.
What is the standard state of meitnerium?
Meitnerium is a solid at standard temperature and pressure.
When was meitnerium discovered?
Meitnerium was discovered in 1982.
Related elements
About this data: property values compiled from IUPAC Standard Atomic Weights (2021), the NIST Atomic Spectra Database, and PubChem. Curated by the Aladdin Scientific technical team. Last reviewed: .