Meitnerium

Meitnerium is a synthetic element with the chemical symbol Mt and atomic number 109. It was named in honor of the physicist Lise Meitner, who contributed to the discovery of nuclear fission. Meitnerium is classified as a transition metal and is part of the group known as the transactinides. Meitnerium does not occur naturally and is produced in particle accelerators through the bombardment of bismuth with heavier particles.