| − | The term "'''critical mass'''" refers to the amount of a radioactive [[isotopes|isotope]] necessary to cause an explosion due to a chain reaction.<ref>Wile, Dr. Jay L. ''Exploring Creation With Physical Science''. Apologia Educational Ministries, Inc. 1999, 2000</ref>
| + | '''Critical mass''' refers to the mass of a radioactive [[isotopes|isotope]] necessary to cause a sustainable nuclear chain reaction.<ref>Wile, Dr. Jay L. ''Exploring Creation With Physical Science''. Apologia Educational Ministries, Inc. 1999, 2000</ref> |