some are, some aren't. they use fission, fusion, or both (in various amounts depending on desired effects).
Nuclear fusion.
Nuclear bombs before the 60s were referred to as atom bombs, because the term Nuclear hadn't been discover yet. Nuclear bombs today, are generally Hydrogen bombs, or fusion bombs. They are significantly more powerful, able to places about the size of Rhode Island. Atom bombs,which were mostly uranium and plutonium, lack the destructive power of Nuclear or Fusion bombs.
The same nuclear radiation is released by both fission (atomic) and fusion (hydrogen) bombs. Hydrogen bombs are larger, and produce more.
A nuclear bomb can be made with any desired yield from about 10 tons to well over 50 megatons in one single bomb. These numbers are just for tested devices that worked, there is no theoretical upper limit on the yield of fusion based bombs.
You can't, it is always generated. However "clean" fusion bombs can be designed that reduce the fallout compared to a conventional fusion bomb of the same yield to about 5%. However the cost to build these "clean" bombs is significantly higher per megaton of yield than conventional fusion bombs.
Nuclear fusion.
Both basically are the same, they can be fission or fusion bombs like Uranium,Plutonium and Hydrogen bombs. A general description would be that atomic bombs are fission bombs. Nuclear bombs are fusion bombs. Fusion bombs are more powerful weight for weight
Bombs.
No place, we have not yet determined how to make a fusion reactor. Only fusion bombs.
Atomic bombs, A bombs, fission bombsHydrogen bombs, H bombs, fusion bombsBoosted fission bombs, "dial-a-yield" bombsMultistaged fusion bombsClean fusion bombs, reduced fallout fusion bombsSalted fusion bombs, dirty fusion bombs, increased fallout fusion bombsetc.
Well, fusion bombs are, but fusion reactors should not be (if we can build them).
Very big bombs.
in nuclear fusion bombs
H-bombs
FissionFusionBoosted FissionMultistage Fusion
fission and the fusion types
Nuclear bombs before the 60s were referred to as atom bombs, because the term Nuclear hadn't been discover yet. Nuclear bombs today, are generally Hydrogen bombs, or fusion bombs. They are significantly more powerful, able to places about the size of Rhode Island. Atom bombs,which were mostly uranium and plutonium, lack the destructive power of Nuclear or Fusion bombs.