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- Meitnerium, on the periodic table. Extremly radioactive, superheavy, synthetic transactinide element, with element symbol Mt and atomic number 109. Named after Austrian-Swedish physicist Lise Meitner. Mouse Pad #662839662
Meitnerium, on the periodic table. Extremly radioactive, superheavy, synthetic transactinide element, with element symbol Mt and atomic number 109. Named after Austrian-Swedish physicist Lise Meitner. Mouse Pad #662839662