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1. Weak Nuclear Force :Fundamental interaction that underlies some forms of radioactivity and certain interactions between subatomic particles.

It acts on all elementary particles that have a spin of 1/2. The particles interact weakly by exchanging particles that have integer spins. These particles have masses about 100 times that of a proton, and it is this relative massiveness that makes the weak force appear weak at low energies.

2. Strong nuclear Force:Fundamental force acting between elementary particles of matter, mainly quarks.

The strong force binds quarks together in clusters to form protons and neutrons and heavier short-lived particles. It holds together the atomic nucleus and underlies interactions among all particles containing quarks

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