Mt
Meitnerium
MEITNERIUM
TRANSITION ELEMENT: COBALT GROUP
| Atomic number: | 109 |
| Group numbers: | 9 |
| Period: | 7 |
| Electronic configuration: | [Rn] 5f14 6d7 7s2 |
| Formal oxidation number: | |
| Electronegativities: | - |
| Atomic radius / pm: | - |
| Relative atomic mass: | - |
Meitnerium was discovered by Peter Armbruster, Gottfried Münzenber (DE) and their co-workers at the Heavy Ion Research Laboratory (Gesellschaft für Schwerionenforschung, GSI) in Darmstadt, Germany in 1982. Named in honour of Lise Meitner, the Austrian physicist. It is a synthetic radioactive metal. Meitnerium was produced by bombarding bismuth-209 with iron-58.
| Density / g dm-3: | - | |
| Molar volume / cm3mol-1: | - | |
| Electrical resistivity / µΩcm: | - | (20 °C) |
| Thermal conductivity / W m-1K-1: | - |
| Melting point / °C: | - |
| Boiling point / °C: | - |
| Heat of fusion / kJ mol-1: | - |
| Heat of vaporization / kJ mol-1: | - |
| Heat of atomization / kJ mol-1: | - |
| First ionization energy / kJ mol-1: | - |
| Second ionization energy / kJ mol-1: | - |
| Third ionization energy / kJ mol-1: | - |
| in the atmosphere / ppm: | - |
| in the Earth's crust / ppm: | - |
| in the oceans / ppm: | - |
| Crystal structure: | unknown structure |
| Unit-cell dimensions / pm: | - |
| Space group: | - |
| Isotope | Relative atomic mass | Mass percent (%) |
|---|---|---|
| 276Mt | 276.152(4) | * |
| 278Mt | 278.156(5) | * |
| Balanced half-reaction | Eo / V | |
|---|---|---|
| 108 Hassium | ← | 109 Meitnerium | → | 110 Darmstadtium |
Citing this page:
Generalic, Eni. "Meitnerium." EniG. Periodic Table of the Elements. KTF-Split, 13 Feb. 2025. Web. {Date of access}. <https://www.periodni.com/mt.html>.
Copyright © 1998-2025 by Eni Generalic. All rights reserved. | Bibliography | Disclaimer