Answer:
a series of decays producing sequentially more stable nuclei
Step-by-step explanation:
A nuclear decay chain represents a series of decays producing sequentially more stable nuclei.
- For every atomic nucleus, there is a specific neutron/proton ratio which ensures the stability of the nucleus.
- Any nucleus with a neutron/proton combination different from its stability ratio (i.e either too many neutrons or too many protons) will be unstable and split into one or more other nuclei with the attendant emission of small particles of matter.
- The decay process is a continuous chain reaction steps.
- Until stability of the nucleus is attain, it continues.