The world's first nuclear explosion occurred on July 16, 1945, when a plutonium implosion device was tested at a site located at:

The world's first nuclear explosion occurred on July 16, 1945, when a plutonium implosion device was tested at a site located at:

Explanation

The world's first nuclear explosion occurred on July 16, 1945

It was tested at a site located 210 miles south of Los Alamos, New Mexico,

The code name for the test was "Trinity."

The test was of an implosion-design plutonium bomb, nicknamed the "gadget"

The same design as the Fat Man bomb later detonated over Nagasaki, Japan, on August 9, 1945