Meitnerium (Mt), element 109 – Learn Acer periodic table

Transition metal, atomic number 109.

Meitnerium is a chemical element with symbol Mt and atomic number 109. It is an extremely radioactive synthetic element (an element not found in nature that can be created in a laboratory). The most stable known isotope, meitnerium-278, has a half-life of 7.6 seconds.

Symbol Mt. Atomic mass 278.0 u. Group 9, period 7. Electron configuration [Rn] 5f14 6d7 7s2. Electrons per shell 2, 8, 18, 32, 32, 15, 2. State at room temperature: Solid. Melting point unknown, boiling point unknown. Discovered by Gesellschaft für Schwerionenforschung.

Element data from Wikipedia, CC BY-SA 3.0.

Meitnerium (Mt), element 109 – Learn Acer periodic table

Meitnerium

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