isotope Hear it!

isotope Definition

iso·tope (īsə tōp′)

noun

any of two or more forms of an element having the same or very closely related chemical properties and the same atomic number but different atomic weights (or mass numbers) U-235, U-238, and U-239 are three isotopes of uranium

Etymology: < iso- + Gr topos, place: see topic

isotope Related Forms

i′so·topic (-täpik, -tōpik) adjective i′so·topi·cally adverb isot·opy (ī sätə pē, īsə tō′pē) noun

isotope Usage Examples

Preposition: of

  • iodine: Radioactive iodine ( Iodine-131 ) is a radioactive isotope of iodine, usually taken in an oral solution formulation.
  • hydrogen: Deuterium is one of the heavier isotopes of hydrogen, having one extra neutron.
  • uranium: For example, uranium-238 is a radioactive isotope of uranium with a half life of about 4.6 billion years.

Preposition: as

tracer: Mass spectrometry is used both as an analytical tool and for metabolic studies using stable isotopes as tracers.

Adjective modifier

  • cosmogenic: Thus the changes in the open flux and cosmogenic isotopes do not appear to be linked to the 100-year drift in TSI.
  • radioactive: A small amount of radioactive isotope, carbon called 14 C can then be added to the water they are kept in.
  • radiogenic: Variation of radiogenic isotopes, trace elements and helium with distance from the center of the Iceland plume.
  • stable: These stable isotopes can tell us a number of things about what a person's diet has been for most of their life.
  • short-lived: Initially, it is placed in cooling ponds to allow short-lived radioactive isotopes to decay.

Modifies a noun

  • geochemistry: The written report will consist of a 1500-word account of one area of isotope geochemistry selected from a list supplied by the course team.
  • fractionation: Despite these strong isotope shifts, we found a largely uniform isotope fractionation.
  • spectrometry: Breath samples were analyzed by continuous flow isotope ratio mass spectrometry.
  • tracer: Mass spectrometry is used both as an analytical tool and for metabolic studies using stable isotope tracers.
  • systematics: The trace elements and isotope systematics will be compared to current knowledge of MOR hydrothermal fluids.
  • dilution: Target values were determined by isotope dilution GCMS at Professor Thienpont's laboratory in Gent.

Noun used with modifier

  • strontium: The ratio of strontium isotopes changed rapidly in Early Jurassic oceans with the result that values are time diagnostic.
  • oxygen: The power spectrum of oxygen isotope data from ocean sediment cores.
  • sulfur: In addition, sulfur isotope analyzes have been performed on eleven corrosion samples from city centers.
  • uranium: Based upon the measured concentrations the lifetime risk due to the ingestion of uranium isotopes was estimated.
  • carbon: The release of methane into the atmosphere explains the sudden shift in carbon isotopes.

Browse dictionary entries near isotope

  1. isotonic
  2. isotone
  3. isothermal
  4. isotherm
  5. isothere
  6. isostasy
  7. isospin
  8. isosmotic
  9. isoseismal
  10. isosceles
  1. isotopic spin
  2. isotropic
  3. isozyme
  4. ISP
  5. Isr
  6. Israel
  7. Israeli
  8. Israelite
  9. Issachar
  10. issei