These days, depending on the size triggered, just one. One would be sufficient enough to cause a nuclear fallout in witch we will all be in a world of hurt.
The UK is estimated to have a stockpile of approximately 160 active nuclear warheads and 225 nuclear warheads in total.
About 30,000.
300
In nuclear reactors used to generate electricity, and in many nuclear warheads.
as per today's update Russia has more than 3000 nuclear warheads(deactivated),1200 warheads ready for use. US has nearly 2400 nuclear warheads stockpiled and 400 nukes ready for use.
more than has ever been built.
It is difficult to determine an exact number of nuclear warheads needed to end all life on Earth as it would depend on various factors such as targeting and the size of the warheads. However, it is believed that even a small fraction of the world's nuclear arsenal could potentially cause catastrophic global consequences.
France possesses approximately 300 active nuclear warheads.
Russia has over 55000 nuclear warheads. Massive production occurred mainly after the 9/11 attack on U.S. soil. Many believe it to be in preparation for a 3rd World War.
A supernova releases an immense amount of energy, equivalent to billions of nuclear warheads exploding concurrently. The exact number would depend on the yield of each warhead, but it would be a vast number.
Around 400 nuclear warheads. China has the third largest nuclear arsenal in the world.
over 9000