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Isotope Definition and Explanation PDF | Download eBooks

Learn Isotope definition in biology with explanation to study “What is Isotope”. Study isotope explanation with biology terms to review biology course for online degree programs.

Isotope Definition:

  • Different atomic forms of the same element are called isotopes of the element.

    Campbell Biology by J.B. Reece, L.A. Urry, M.L. Cain, S.A. Wasserman, P.V. Minorsky, R.B. Jackson

Isotope Explanation:

Different forms of the same element atoms that may have same number of protons but different number of neutrons. The isotopes therefore vary in relative atomic mass but have the same properties as the element. Each atomic number identifies a specific element, but not the isotope which means that an atom of a given element may have a wide range in its number of neutrons if it has isotope forms. The number of nucleons (both protons and neutrons) in the nucleus is the atom's mass number, and each isotope of a given element has a different mass number.

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