also known as



Name Meitnerium
Symbol Mt
Atomic Number 109
Atomic Mass 266.0 atomic mass units
Number of Protons 109
Number of Neutrons 157
Number of Electrons 109
Melting Point Unknown
Boiling Point Unknown
Density Unknown
Normal Phase Synthetic
Family Transition Metal
Period 7
Cost Unavailable



Origin of Name After the Lise Meitner, Austrian physicist
Date and Place of Discovery In 1982 at the Heavy Ion Research Laboratory in Darmstadt, Germany
Discovered by Peter Armbruster and Gottfried Münzenberg
Common Compounds There are no known compounds.
Interesting facts
  • It was produced by fusing together the isotopes iron-58 and and bismuth-209.
Common Uses There are no known uses outside the laboratory.


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