Question

if similar charges repel each other then why protons in nucleus not fly away

Answer 1

Hey there!!
Here's ur answer

There is a strong electrostatic force present that binds d protons together....and also due to d presence of electrons which counteract their charges...

hope it will help u....

Answer 2

The strong nuclear force is responsible for holding together the nucleus. At the distance scale of a proton (about 1 femtometer, or 10−15 meters), the strong nuclear force is about 137 times stronger than the electromagnetic force. Therefore, the repulsive force due to both the protons being electrically positive is not strong enough to break the nucleus apart.

thnx my dear