What was the nuclear weapon used by the us to force japan to surrender during ww2?

[yellowpanda779]

What was the nuclear weapon used by the us to force japan to surrender during ww2?

[happyleopard410]

Two nuclear weapons were used -- the Little Boy, a gun-type uranium-fueled nuclear weapon that was deployed against Hiroshima on Monday, August 6, 1945. The second was the Fat Man, an implosion-type plutonium-fueled nuclear weapon deployed against Nagasaki on Thursday, August 9, 1945.