Protons and neutrons exist together in an extremely small space within the nucleus. How is this possible when protons repel each other?
Firstly you have to get a rough idea of four fundamental forces of nature.
There are four fundamental forces in nature.
1.Gravity.
2.The weak nuclear force.
3.Electromagnetism.
4.The strong nuclear force.
The list is in ascending order in terms of strength.
Proton repelling each other is due electro magnetic force but protons and neutrons sticking to each other is due to strong nuclear force. As strong nuclear force is greater than electro magnetic force, the nucleus has protons and neutrons...