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Meitnerium (Mt)
Element with atomic number 109, category: Unknown, a solid at room temperature.
Element 109 of 118
Unknown
Meitnerium
Group 9, Period 7
Common Uses
Research
Electron Diagram
About Meitnerium
Meitnerium is a chemical element with the symbol Mt and atomic number 109, meaning every atom has 109 protons in its nucleus. It is classed as Unknown and is a solid at room temperature (estimated, never measured directly because this element decays within seconds). Its atomic mass is about 278 atomic mass units (u).
On the periodic table, Meitnerium sits in group 9, period 7, which determines how many electron shells it has and how it tends to react with other elements.
Uses of Meitnerium
In daily life and industry, Meitnerium is used for Research. These uses are closely tied to the typical properties of elements in the Unknown category.
Electron Structure of Meitnerium
Using a simplified electron shell model (at most 2 electrons in the first shell, 8 in the second, 18 in the third, and so on), Meitnerium has 6 electron shells, with an approximate arrangement of 2, 8, 18, 32, 32, 17 electrons from the innermost shell to the outermost. This is a simplified learning model, not the full electron configuration that accounts for the s, p, d and f subshells.
Explore Other Elements
Want to see another element or try the element symbol quiz? Go back to the Interactive Periodic Table to explore all 118 chemical elements.