If neutrons exert only attractive force, why don't we have a nucleus containing neutrons alone?

A neutron exerts a force on a proton which

A neutron exerts a force on a proton which

A neutron exerts a force on a proton which

Why don't polymers have a sharp melting point?

Why don't we drink sea water

STATEMENT-I: It is easy to remove a proton from ._(20)^(40)Ca nucleus as compared to a neutron. STATEMENT-II: Inside nucles neutrons are acted on only by attractive forces but protons are also acted on by repulsive forces.

The strong attractive force which binds together the protons and neutrons in a nucleus is called strong nuclear force.Give some examples of this force.

The strong attractive force which binds together the protons and neutrons in a nucleus is called strong nuclear force.Mention its important properties?