Plutonium was first produced in November 1943, later used in atomic bomb dropped on Nagasaki

Some plutonium trifluoride was reduced to create the first sample of plutonium metal in November 1943. Enough plutonium was produced to make it the first synthetically made element to be visible with the unaided eye. Plutonium was later (on August 6, 1945) used in the atomic bomb dropped on Nagasaki, Japan. 'Little Boy', a uranium gun-type bomb that exploded with about thirteen kilotons of force. At the time of the bombing, Hiroshima was home to 280,000-290,000 civilians and 43,000 soldiers. Between 90,000 and 166,000 people are believed to have died from the bomb in the four-month period following the explosion.