Top 10 Nuclear Power Countries in the World: Nuclear weapons are one of the highly recognized power in the world , which has many drawbacks, also some benefits in terms of peace and sovereignty. due to this title no one can attack a country having nuclear power easily. there are many wars fought between different nations of world but the weapons of mass destruction are rarely used. There are only eight states which have successfully denoted this title, they are Categorized under *.NPT *.Non-NPT Nuclear Powers *.Undeclared Nuclear power Following is a list of admitted nuclear weapons possession holder nations and the years when they tested their first successful nuclear experiment. List of Nuclear Power Countries Under NPT RankCountryWarheads Active/TotalYear of 1st ExperimentCTBT status 1. United States2150/77001945Signatory 2.Russia1740/85001949Ratifier 3.United Kingdom160/2251952Ratifier 4.France290/3001960Ratifier 5.ChinaN.A/2401964Signatory List of Non-NPT Nuclear Powers RankCountryWarheads Active/TotalYear of 1st ExperimentCTBT Status 1.IndiaN.A./ 80–1001974Non-signatory 2.PakistanN.A./ 90–1101988Non-signatory 3.North KoreaN.A./ <102006Non-signatory While Israel is undeclared power in the world having total 80-200 weapons . USA is the leading nation which has most nuclear weapons as compared to all the nations. It developed these during the world war 2 with the help of U.K and Canada and it was tested in 1945. It has almost 2150 active weapons. All the information is collected from different authentic and verified sources.