Mendelevium Hats

Description: An eclipsing Mendelevium design. Mendelevium is a synthetic element with chemical symbol Md (formerly Mv) and atomic number 101. A metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities through neutron bombardment of lighter elements. It is the third-to-last actinide and the ninth transuranic element. Brought to you by Periodic-Tees.com

Description: The actinides are not only radioactive, but they have been used in warfare. Little Boy was an uranium bomb dropped on Hiroshima and Fat Man was a plutonium bomb dropped on Nagasaki.