The starting substances in a chemical reaction are called reactants - they are written on the left side of a chemical equation.
Here is what radioactive decay is:
<span>Radioactive decay is the spontaneous breakdown
of an atomic nucleus resulting in the release of energy and matter from
the nucleus. Remember that a radioisotope has unstable nuclei that does
not have enough binding energy to hold the nucleus together.</span>
Answer:
Muscular contractions that moves food along the digestive tract.
The Answer Should Be Electrons.