Isotopes

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  • Atoms - Lesson 7 - Isotopes
    • ISOTOPES are the same except for extra NEUTRONS
      • ISOTOPES are different forms of the same element, which have the SAME NUMBER of PROTONS but a DIFFERENT NUMBER of NEUTRONS.
        • So SAME ATOMIC NUMBER but DIFFERENT MASS NUMBERS
          • Popular example is CARBON-12 and CARBON-13
    • Relative Atomic Mass
      • Many ELEMENTS can exist as a different number of isotopes, RELATIVE ATOMIC MASS is used instead of mass number. It's an AVERAGE mass taking into account the DIFFERENT MASSES and ABUNDANCES of all isotopes that make up an element.
        • RAM = Sum of (isotope abundance x isotope mass number)/sum of abundances of all the isotopes

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