Mt
278.000Meitnerium
Meitneriyum
Meitnerium is a synthetic transactinide element with atomic number 109. It is named after Lise Meitner and is studied mainly through nuclear decay, with predicted Group 9 chemistry related to iridium.
109
278 g/mol
[Rn] 5f¹⁴ 6d⁷ 7s²
2 | 8 | 18 | 32 | 32 | 15 | 2
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37.4 g/cm³
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GSI Darmstadt
Meitnerium was synthesized in 1982 at GSI Darmstadt by bombarding bismuth-209 with iron-58. It is named after Lise Meitner, whose work was central to understanding nuclear fission.
Meitnerium-278
Half-life: About 4.5-9 seconds. Among the longest-lived known meitnerium isotopes; values vary by nuclear data source.- Nuclear decay and superheavy element research
- Theoretical Group 9 chemistry studies
- Relativistic calculations comparing meitnerium with iridium
Meitnerium has no biological role. It is synthetic, radioactive and produced only atom by atom.
- Meitnerium is one of the few elements named after a woman scientist.
- No confirmed chemical compound of meitnerium has been experimentally characterized yet.
- The element name is often seen as a delayed recognition of Lise Meitner’s contribution to nuclear fission science.
- Meitnerium has atomic number 109 and symbol Mt.
- Its calculated electron configuration is [Rn] 5f¹⁴ 6d⁷ 7s².
- Meitnerium is predicted to be a Group 9 transactinide below iridium.
- Remember Mt for Lise Meitner and nuclear fission history.
What is the atomic number of meitnerium?
The atomic number of meitnerium is 109.
What is the electron configuration of meitnerium?
Meitnerium is commonly listed with the calculated electron configuration [Rn] 5f¹⁴ 6d⁷ 7s².
What is meitnerium used for?
Meitnerium has no commercial use; it is used only in nuclear physics and theoretical chemistry research.
Who is meitnerium named after?
Meitnerium is named after Lise Meitner.
Has meitnerium chemistry been studied experimentally?
Meitnerium chemistry has not yet been characterized in the way lighter transactinides such as hassium have been studied.