It would depend on the size of the bomb.
1
Cannot be answered as there are too many variables, only one of which is the yield of the bombs used.
that would depend on yield and where they were detonated. but the answer is more than have ever been built or could be built.
Do you mean - to kill everybody, or - to make the Earth disintegrate? It also depends on how big the bombs are and where they are placed.
To say how many nuclear bombs it would take to blow up the sun is almost impossible. Actually the sun is a continuously exploding thermonuclear bomb, that's where the energy comes from - fusion. It doesn't matter how many bombs you shot into the sun, it would just get hotter.
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.
Anywhere from 1 to trillions, depending on:yieldburst height/depthburst slant rangeetc.
none, australia is not a nuclear power
About 10700000000000000000000000 h bombsThis is a complicated function of:yieldslocations of burstsmaterial around burstsetc.It would be far far easier to just blow away the atmosphere and leave the earth alone and even far far easier to light firestorms in all the forests and fill the stratosphere with soot for decades causing nuclear winter.
Well, to my research there hasn't been any nuclear bombs, Aussie has built.
in many places