They have a considerable number, yes.
If by strongest you mean highest yield: China; they still stockpile some multimegaton warheads to compensate for inaccuracy of their missiles. Other countries no longer bother with such large, heavy, and expensive bombs. If by strongest you mean largest stockpile: Russia.
The US has not stopped. There was a pause following the signing of the START treaty to allow stockpile reductions, but the US is now beginning a cycle of replacement of everything still in the stockpile with brand new designs of nuclear weapons. The stockpile size will continue to reduce to meet the START limits, but eventually this will all be newly made and the old ones fully retired.
so if some other country nukes us we can nuke them and us having the biggest bombs is intimadating to other countries with nukes
Nukes
right now... Still Japan. Pakistan they have nukes :)
Russia is developed and still developing. As Russia is such a big country which has such a huge population, it means that is a bit unfair to put it against other countries because, it is so much bigger. This means that the numbers are so much lower and that smaller countries seem more developed than Russia. But I would say Russia is more developed than undeveloped.
no effects still exist. Nukes leave a lot of radiation etc but not atomic bombs
Yes.
I believe that is still classified Top Secret-Q Restricted Data. The most current data on the US stockpile that is not classified is from 1946, following Operation Crossroads (where we detonated 2 stockpile devices for effects tests at Bikini atoll) the US had a grand total of 4 fission bombs remaining in stockpile. I am still looking to find additional data, if I can't I may have to file a FOIA or MDR request.
they didn't have an actual war no one was killed they didn't fight because they both had nukes and if they attacked they were going to bomb each other with nukes. so they became neutral. and i think there still neutral today
Ehm, it's (still) Russia!?
Yes,it is only apart of Russia.