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TeachMeFinance.com - explain isotope isotope The term 'isotope' as it applies to the area of nuclear science can be defined as ' Two or more forms (or atomic configurations) of a given element that have identical atomic numbers (the same number of protons in their nuclei) and the same or very similar chemical properties but different atomic masses (different numbers of neutrons in their nuclei) and distinct physical properties. Thus, carbon-12, carbon-13, and carbon-14 are isotopes of the element carbon, and the numbers denote the approximate atomic masses. Among their distinct physical properties, some isotopes (known as radioisotopes) are radioactive because their nuclei emit radiation as they strive toward a more stable nuclear configuration. For example, carbon-12 and carbon-13 are stable, but carbon-14 is unstable and radioactive. '. The term 'isotope' as it applies to the area of carbon dioxide can be defined as ' One of two or more atoms that have the same atomic number (i.e., the same number of protons in their nuclei) but have different mass numbers'. The term 'isotope' as it applies to the area of coastlines can be defined as ' an atom with a specified number of protons and a specified number of neutrons'. Previous 5 Terms: isotherm Isothermal isothermobath isotherms isotherombrose Next 5 Terms: isotope Isotope separation Isotopes Isotopic enrichment Isotropic About the author Mark McCracken Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English". Copyright © 2005-2011 by Mark McCracken, All Rights Reserved. TeachMeFinance.com is an informational website, and should not be used as a substitute for professional medical, legal or financial advice. Information presented at TeachMeFinance.com is provided on an "AS-IS" basis. Please read the disclaimer for details.