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.
Description:
The word teacher spelled with periodic table element tiles: Tellurium, Actinium, Hydrogen and Erbium, with an atom and a lab flask. A retro 70s chemistry graphic for science teachers.
