None, the US currently only refurbishes existing bombs.
40,000
At this time the US builds no nuclear bombs. A small number of existing bombs are refurbished as needed.
No nuclear bombs were tested on Easter Island.
none, australia is not a nuclear power
Well, to my research there hasn't been any nuclear bombs, Aussie has built.
in many places
None
Russia has roughly 3500 nuclear warheads at the time of this writing and the number is slowly falling.
there were two types of nuclear bombs. A "gun type" bomb and an implosion type one with a plutonium core
2
Two.
Without knowing the yield of your hypothetical nuclear bombs it is not possible to answer this question. Please clarify.