meitnerium
/maɪtˈnɪriəm/
noun
- A radioactive chemical element with the symbol Mt and atomic number 109. It is a synthetic metal that does not occur naturally.
- Scientists study meitnerium to learn more about heavy elements.
- Meitnerium was first created in 1982 by a German research team.
- Only a few atoms of meitnerium have ever been produced in laboratories.