Final answer:
In nuclear decay, an isotope with a large neutron-to-proton ratio will emit a beta particle.
Step-by-step explanation:
In nuclear decay, an atom of an isotope with a large neutron-to-proton ratio will most likely emit a beta particle. Beta decay involves the conversion of a neutron into a proton and an electron. This process helps to rebalance the neutron-proton ratio in the nucleus of the atom.
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