For which question could a testable hypothesis be developed? a. theories may change as a result of new information. b. theories may be proven to be true and become laws. c. theories may not change because they are facts. d. theories may be proven to be true and become hypotheses.

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