Isotopes

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Isotopes

  1. 1. What are isotopes?1cm Isotopes are variations of chemical elements that have the same number of protons but different numbers of neutrons.
  2. 2. What are isotopes?1cm Isotopes are variations of chemical elements that have the same number of protons but different numbers of neutrons. We identify isotopes based on their mass, whereby the sum of protons and neutrons equals the mass of the isotope.
  3. 3. What are isotopes?1cm This carbon atom has a mass of 12: 6 protons + 6 neutrons.
  4. 4. What are isotopes? 1cm This carbon atom has a mass of 12:12 C 6 protons + 6 neutrons. The name of this isotope, then, is 12C: C for carbon, 12 for its mass.
  5. 5. What are isotopes? 1cm Two other isotopes of carbon exist in addition to 12C. They are:12 C 6 protons + 6 neutrons
  6. 6. What are isotopes? 1cm Two other isotopes of carbon exist in addition to 12C. They are:12 C 6 protons 13 C 6 protons + 6 neutrons + 7 neutrons and…
  7. 7. What are isotopes? 1cm Two other isotopes of carbon exist in addition to 12C. They are:12 C 6 protons 13 C 6 protons + 6 neutrons + 7 neutrons 14 C 6 protons + 8 neutrons
  8. 8. What are isotopes? C 12 1cm 6 protons 13 C 6 protons + 6 neutrons + 7 neutrons 14 C 6 protonsSince isotopes have distinct + 8 neutronsmasses, we identify C isotopes inour samples by measuring the massof the carbon atoms. We use aninstrument called an isotope ratiomass spectrometer to make thesemeasurements.

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