These are top 10 countries with largest numbers of nuclear technology 
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Russia
United States
France
China
United Kingdom![Screenshot_5.png](
Pakistan
India
Israel
North Korea
Iran
Russia
Russia is considered as the biggest nuclear power country in the world, with an estimated 8500 warheads in its control. The country has conducted a total of 715 nuclear tests till date, with the first test dating back to 1949 and the most recent one conducted in 1990.United States
Featuring on number 2 in the list of top 10 nuclear power countries in the world is United States, which has 7700 nuclear weapons in its inventory. It has conducted around 1054 nuclear tests, with the first one back in 1945 and the latest one carried out in 1992.France
On number 3 in this list is France, which has an estimated 300 nuclear warheads. The country registered its presence in this field in 1960 by conducting its first nuclear test, and has conducted 210 such tests till date, the most recent one being conducted in 2006.China
China is another major nuclear power country of the world, with came to the nuclear weapon scenario in 1964 with its first nuclear test. Today, the country owns nearly 250 nuclear warheads and has conducted 45 nuclear tests in all, with the last one back in 1996.United Kingdom
With an estimated 225 nuclear warheads in its inventory, United Kingdom comes on number 5 in the list of top 10 nuclear power countries of the world. Till date, United Kingdom has carried out 45 nuclear tests, the first one being in 1952 and the most recent one in 1991.Pakistan
Pakistan occupies sixth position on this list, with estimated 100-120 weapons in stock. The country carried out a total of 6 nuclear tests, all in 1998, which greatly escalated tension in this part of the world at that time.India
Next on the list of top 10 nuclear power countries of the world is India, which has estimated 90-110 warheads with it. Out of the 6 nuclear tests carried out by the country, the first one was conducted in 1974 and the most recent one in 1998.Israel
Featuring next on this list of biggest nuclear powers in the world is the small nation of Israel, which has as many as 80 warheads. The other statistics about nuclear tests conducted by Israel are not known.North Korea
North Korea is on number 9 in this list, which has come to the nuclear power scene more recently, the first test being carried out in 2006. Currently, North Korea has 10 nuclear warheads and has conducted a total of 3 nuclear tests, with the most recent one in 2013.Iran
Iran has been recognized as one of the nuclear powers in the world, though no information is available about its possession of nuclear warheads or nuclear tests conducted by it.