Like Charges repel Each other so how it is possible to contain so many protons together in a nucleus? Which force keeps them tightly coupled? My Chemistry is too weak, so please don't assume it so silly question.

 

That would be the Strong Nuclear Force.

 

Like Charges repel Each other so how it is possible to contain so many protons together in a nucleus? Which force keeps them tightly coupled? My Chemistry is too weak, so please don't assume it so silly question.

Check out the following summary of the four fundamental forces.

http://hyperphysics.phy-astr.gsu.edu/hbase/forces/funfor.html