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.
They are both general terms. The term "atomic bomb" can mean any nuclear weapon, either a fission weapon or a fusion weapon (the so-called hydrogen bomb). The term thermonuclear bomb is also used in general, but it usually excludes the fusion bombs. It should be noted, however, that it takes a fission bomb to generate the heat necessary to "set off" a fusion reaction and make a fusion bomb work.
Its probably best if you read Richard Rhodes books: The Making of the Atomic Bomb and Dark Sun.
The work continued to restore the city after the atomic bombs.
Atomic bombs work by initiating a chain reaction of nuclear fission, where the nucleus of an atom is split into smaller parts, releasing a tremendous amount of energy in the process. This energy is released in the form of heat, light, and shockwaves, causing widespread destruction and devastation.
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.
Here is a YouTube video explaining the chemical reactions and what materials they use for atomic bombs, and it's very easy to understand. http://www.youtube.com/watch?v=rK67Dj1jyc8