Yes, that is correct.
no
all nuclear explosives use some fission. even now.
yes, both true & false. They can work either by fission or some combination of fission & fusion. Most modern nuclear bombs use both fission & fusion to optimize for mission, size, weight, cost, etc. Total yield can vary from 100% fission to more than 95% fusion.
Probably the best unclassified sources of this information are Richard Rhodes books: The Making of the Atomic Bomb and Dark Sun.
Better than expected.
Its probably best if you read Richard Rhodes books: The Making of the Atomic Bomb and Dark Sun.
nothing They're overall work; they discovered Atomic Fission.
The work continued to restore the city after the atomic bombs.
Germany and United States where working to make them work. United States got it first and used first on Japan over the cities of Hiroshima and Nagasaki.
If the atomin bomb didnt work. The preident (Harry Truman) would launch an all-out attack on Japan that I would estimate kill as much people as 20 atomic bombs.
Leo Szilard invented the neutron chain reaction process that makes atomic fission bombs work in 1933.Richard Tolman invented the implosion assembly process that made the plutonium atomic fission bomb possible in 1942.Stanislaw Ulam brought the idea of x-ray driven implosion to Edward Teller and together they invented the staging process (usually called the "Teller-Ulam design" in the US and "Sakharov's Third Idea" in Russia) used in hydrogen fusion bombs in 1951.
Harry Truman, only after japan wouldn't work with the US