radioactive « Back to Glossary IndexThe process of atoms breaking down randomly and spontaneously. Synonyms: radioactivityRelated Articles: Glossary: half lifeGlossary: alpha decayGlossary: parent isotopeGlossary: daughter isotopeGlossary: beta decay« Back to Glossary Index Author: Chris Assistant Professor, Salt Lake Community College, Salt Lake City, Utah View all posts by Chris