This tag should only be applied where the effects are specifically related to variance in mass number with the same atomic number (existence of isotopes). Examples include: radioactivity and other nuclear properties, kinetic effects, specific relevance to spectroscopy (e.g., NMR, IR), isotope separation, isotopic analysis.

An atom (or aggregation of atoms) of a particular element identified by mass number and distinguished by the number of neutrons in its nucleus. Any atom of any given element can be classified as an isotope, so questions should be limited specifically to effects related to variance in mass number. Examples are:

  • Radioactivity and other nuclear properties
  • Kinetic effects
  • Specific relevance to spectroscopy (e.g., NMR, IR)
  • Isotope separation
  • Isotopic analysis