U-235, U-238, and U-239 are three isotopes of uranium.
An example of an isotope is Carbon 12 to Carbon 13.
Other Word Forms
Origin of isotope
- iso– Greek topos place (so called because the isotopes of a chemical element occupy the same position in the periodic table of elements)
From American Heritage Dictionary of the English Language, 5th Edition
- Coined in 1914 by British chemist Frederick Soddy from Ancient Greek ἴσος (ísos, “equal; same”) and τόπος (tópos, “place”), because the different isotopes of a chemical element always occupy the same position in the periodic table of elements. Compare the synonymous Icelandic word samsæta.
- Possible back-formation from isotopy.