Define nuclear force.

(N/A) The nuclear force is the strong attractive force that acts between nucleons (protons and neutrons) within the nucleus of an atom.
It is responsible for binding the nucleons together to form a stable nucleus,overcoming the electrostatic repulsion between positively charged protons.
Key characteristics include:
$1$. It is a short-range force,effective only up to a distance of about $1-2 \ fm$ $(1 \ fm = 10^{-15} \ m)$.
$2$. It is much stronger than the electromagnetic force and gravitational force.
$3$. It is charge-independent,meaning it acts equally between proton-proton,neutron-neutron,and proton-neutron pairs.