Modern nuclear weapons are rarely pure fission or fusion, but are typically some mixture of them in a unique arrangement to get desired effects, in a desired package size, at an affordable production cost.
A fission bomb relies on nuclear fission (splitting atoms) to release energy, while a fusion bomb relies on nuclear fusion (merging atoms) to release energy. Fusion bombs are more powerful than fission bombs and are often referred to as thermonuclear or hydrogen bombs.
Detonation of a fusion hydrogen bomb is initiated by the primary fission bomb, which generates high temperatures and pressures needed to trigger fusion reactions in the hydrogen isotopes. The fission bomb compresses and heats the fusion fuel to the point where nuclear fusion reactions can occur, releasing vastly more energy than the fission reaction alone.
A atomic bomb is an example of fission, as it relies on the splitting (or fission) of heavy atomic nuclei to release a massive amount of energy. Fusion, on the other hand, involves the merging of lighter atomic nuclei, while annihilation is the complete conversion of matter into energy in particle-antiparticle collisions.
That depends on the design. Traditionally fusion bombs have been more powerful than fission bombs, mostly because fusion yield has no limit (just add more stages) and fission is limited to around 1 megaton yield. However it is definitely possible to build small very low yield fusion bombs with yields far below traditional fission bomb yields, especially if your goal is to make "clean" low fallout tactical weapons (or potentially peaceful nuclear construction explosives - as was the goal of project Plowshare).
Yes.TacticalStrategicFission - uranium, plutonium, compositeFusionSolid coreLevitated coreBoosted coreConventional fusion - 90% fission from U-238 fusion tamperClean fusion - ~5% fission mostly from primary & sparkplugDirty fusion - bomb is salted with elements intended to intensify falloutNeutron bomb - a small Clean fusion bomb intended to intensify neutron radiationetc., etc., etc.
Fission.
A fission bomb relies on nuclear fission (splitting atoms) to release energy, while a fusion bomb relies on nuclear fusion (merging atoms) to release energy. Fusion bombs are more powerful than fission bombs and are often referred to as thermonuclear or hydrogen bombs.
Fission.
If you are asking which has the maximum danger, a hydrogen bomb is one type of nuclear bomb. In general, nuclear bombs can be fission (called atomic) or fusion (hydrogen) A fusion bomb is larger than an fission bomb, and actually uses a fission bomb to start the fusion reaction.
Detonation of a fusion hydrogen bomb is initiated by the primary fission bomb, which generates high temperatures and pressures needed to trigger fusion reactions in the hydrogen isotopes. The fission bomb compresses and heats the fusion fuel to the point where nuclear fusion reactions can occur, releasing vastly more energy than the fission reaction alone.
fission and/or fusion
first fission bomb 1945first fusion bomb 1954
TrinityHiroshimaNagasakiCrossroads Baker (first underwater)Ivy Mike (first fusion bomb, 90% fission yield)Ivy King (highest yield fission bomb)Castle Bravo (first dry fuel fusion bomb, 90% fission yield)Castle Romeo (test of first deliverable fusion bomb, MK-17)Redwing Zuni (test of first clean fusion bomb)Redwing Navaho (test of clean fusion bomb, only 5% fission yield)Tzar Bomba (highest yield fusion bomb, USSR)etc.
Fission and/or fusion.
People were/are worried about fusion bombs for the same reasons they were/are worried about fission bombs, except more so because the yield of a fusion bomb is typically much higher than the yield of a fission bomb. So a fusion bomb typically does more of everything a fission bomb does.
fission vs fusion
A atomic bomb is an example of fission, as it relies on the splitting (or fission) of heavy atomic nuclei to release a massive amount of energy. Fusion, on the other hand, involves the merging of lighter atomic nuclei, while annihilation is the complete conversion of matter into energy in particle-antiparticle collisions.