Here you can read more about the chemical element Meitnerium. Its shemical symbol is Mt and its atomic number is 109. The relative atomic mass of Meitnerium is 278 u. The elemental classification of Meitnerium is Unknown chemical properties, and it belongs to group 9 and period 7 in the Periodic Table of Elements.
Meitnerium was discovered in the year 1982 by Gesellschaft für Schwerionenforschung.
To the right (or below if you are using a mobile device with a smaller screen) you will find the information given above for the element Meitnerium ordered in tabular form, which might be easier to read and use if you want to quantify it in some sort.