| Average atomic mass |
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| • | The atomic masses
of an element are the |
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| weighted averages
of all the isotopes of |
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| that element
taking into account the relative |
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| abundance each
isotope. |
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| • | Average at.mass = |
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| %abundance
isotope 1/100% x mass isotope 1 + |
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| %abundance
isotope 2/100% x mass isotope 2 + |
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| etc…... |
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