What occurs in a chemical reaction? Products are formed from reactants by the breaking and forming of new bonds.

Reactants are formed from products by the breaking and forming of bonds.

Products are formed without chemical bonds being broken.

Reactants are formed without chemical bonds being broken.

Daughter element the new element produced along with a decay particle in a nuclear transmutation 2. half-life the substance that decays in a nuclear transmutation 3. parent element the change of one chemical element into another by nuclear decay or radioactive bombardment 4. transmutation the time required for the decay of one-half of the atoms in a sample of radioactive material