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Isotopes - PowerPoint PPT Presentation


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Isotopes. What is an isotope? . Every atom in an element has the SAME number of protons and electrons. NOT ALL atoms in an element have the same neutrons. AN ISOTOPE is an element that has a different number of neutrons and mass number. Example . Oxygen has 8 protons. 8 neutrons

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PowerPoint Slideshow about 'Isotopes' - kelsie-wilkinson


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Presentation Transcript
what is an isotope
What is an isotope?
  • Every atom in an element has the SAME number of protons and electrons.
  • NOT ALL atoms in an element have the same neutrons.
  • AN ISOTOPE is an element that has a different number of neutrons and mass number
example
Example
  • Oxygen has 8 protons. 8 neutrons
    • Mass # = 16
  • Some oxygen atoms have

8 protons, 9 neutrons

  • 8 + 9 = 17 (mass #)
  • Some have 8 protons and 10 neutrons
  • Called Oxygen-16, oxygen-17, oxygen-18