History and Uses: Uranium was discovered by Martin Heinrich Klaproth, a German chemist, in the mineral pitchblende (primarily a mix of uranium oxides) in 1789.
This is too low a concentration to sustain a nuclear chain reaction without the help of a material known as a moderator.
A moderator is a material that can slow down a neutron without absorbing it.
Uranium compounds have been used for centuries to color glass.
A 2,000 year old sample of yellow glass found near Naples, Italy contains uranium oxide.
Uranium is a dense metal that has uses outside of the nuclear power industry.