Decay product is a term used in the field of chemistry and nuclear physics to indicate the substances that are produced as a result of decay or disintegration of radioactive substances. In other words, it refers to the elements or compounds that are formed when a radioactive isotope undergoes radioactive decay. Synonyms for the term decay product include by-product, residue, fallout, remnants, remnants, debris, and detritus. These terms are often used interchangeably in scientific literature and research studies. Understanding the significance of decay products is essential in the study of radioisotopes, nuclear chemistry, and radiation safety.