Name: meitnerium
Symbol: Mt
Atomic number: 109
Atomic weight: [ 268 ]
Group in periodic table: 9
Group name:
Period in periodic table: 7
Block in periodic table: d-block
CAS registry ID: 54038-01-6
Element 109, meitnerium, is a synthetic element that is not present in the environment at all. There is no dispute concerning the name meitnerium for element 109. The interested reader should consult the on-line version of
The Wonderful World of Atoms and Nuclei
for a fascinating insight into research on "super-heavy" atoms.