What percentage of a radioactive species would be found as daughter material after five half-lives? 50% 25% 15% 12.5% 3.125%

How do dying stars contribute to the formation of planets

8. what happens to matter during a chemical reaction

Temperature is defined as a. the equivalent of heat. b. a measure of the average kinetic energy of the individual atoms or molecules composing a substance. c. how hot or cold it is. d. the total kinetic energy of the atoms or molecules composing a substance. e. none of the above is correct.