Explain in short about weak nuclear force.

Explanation

`to` The weak nuclear force appears only in certain nuclear processes such as the B-decay of a nucleus.
`to` In `beta`-decay the nucleus emits an electron and an uncharged particle called neutrino.
`to` The weak nuclear force is not as weak as the gravitational force, but much weaker than the strong nuclear and electromagnetic forces.
`to` The range of weak nuclear force is exceedingly small of the order of `10^(-16)` m.