Meitnerium

Symbol: Mt

Category(transition metal)

Density at 25°C: solid:  n/a

1024px-Lise_Meitner_(1878-1968),_lecturing_at_Catholic_University,_Washington,_D.C.,_1946

Physicist Lise Meitner. image: wikipedia

The longest half-llife of this synthetic element is 7.6 seconds. Hence it has not had much investigated about its chemistry. It releases alpha particles when it decays. 

This element is named after  physicist  Lise Meitner. She was one of the discoverers of nuclear fission processes.

Meitnerium is calculated to have similar properties to its lighter homologues, cobalt, rhodium, and iridium