A nuke works by exploding a exploive charge that is around a tiny ball of uranium or plutonium which is manufactured in nuclear reactors from uraniun-238 when the exploive go's off neutrons are removed from there atoms then they bang into each other that makes a huge amount of energy which makes the big boom
The early nuclear bombs shot a pice of uranium or plutonium down a gun like barrel into a diffent pice of uranium or plutonium which make nuclear fusion and like the new ones they have exploives
the only time nuclear bombs were used was in ww2 on two citys they were droped by a B-29 the 2 bombs were named fat man and little boy. After many years in progress during the Manhattan Project from 1942-1945
