Meitnerium

Meitnerium is a synthetic, highly radioactive element that has been made only in tiny amounts in laboratories. It was first produced in 1982 by fusing nuclei of iron and bismuth, and was named in honor of physicist Lise Meitner. Its atoms decay within seconds, leaving too little material for ordinary uses or detailed study of its chemistry. Scientists predict that it would be a metal, but its physical and chemical properties have not been measured directly.