Answer:
The correct answer is:'by emitting a beta particle'.
Explanation:
An atom with too many neutron relativity in comparison to number of proton will under radioactive decay by the means of beta-decay.
Beta-decay is a radioactive decay process in which a neutron gets converted to into proton and electron as a beta-particle with (-1)charge.
[tex]_Z^A\textrm{X}\rightarrow _{Z+1}^A\textrm{Y}+_{-1}^0\beta[/tex]
So , by emitting a beta-particle an atom with more number of neutrons than protons will under radioactive decay.
