Strongest force
Strong nuclear force
Not Applicable (occurs within the nucleus of all atoms.)
There are four fundamental forces in the universe which account for all interactions between matter and energy. They are the strong nuclear, the weak nuclear, electromagnetic, and gravitational forces. The strongest of these is the strong nuclear force, which is 100 times stronger than the electromagnetic force - the next strongest of the four forces. The strong nuclear force operates only within the nucleus of an atom and so is not experienced directly within everyday life. Its range is about 1 femtometre (1x10 to the minus 15 metres) and it keeps atoms together using subatomic particles called gluons.