Atomic Bomb

Main

Discovery of Neutron

1932

Discovered by James Chadwick

Creation of Uranium 235

1934

Enrico Fermi added a neutron to Uranium in an attempt to create a new element.

Nuclear Fission

1938

Lisa Meitner and Otto Frisch repeat Fermi's experiment, determine he broke down Uranium instead of creating a new element, and gave nuclear fission as the name for the new process.

Chain Reaction

1942

First successful chain reaction of nuclear fission

Manhatten Project

1942

Testing

July 1945

First test of atomic bomb in New Mexico

Japan

August 1945

Atomic bombs are dropped in Japan.