Meitnerium is a very radioactive synthetic element only found in the laboratory. The most stable isotope has a half life of 4.5 seconds. It is named after Lise Meitner an Austrian-Swedish physicist who work on radioactivity. As with other heavy elements its chemical properties are just predicted based on the relationships shown by Iridium. As so little of it has been created the melting and boiling point have not been analysed.
Heavy Ion Research Laboratory (HIRL)