chemistry

The element copper has naturally occuring isotopes with mass numbers of 63 and 65. The relative abundance atomic masses are 69.2% for mass=62.93 amu, and 30.8% for mass=64.93 amu. Calculate the average atomic mass of copper.

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  1. (0.692*62.93) + (0.308*64.93) =

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  2. avgMass= .692*62.93+.308*64.93

    check my thinking.

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    bobpursley
  3. 23. The element copper has natu rally occurring isotopes with mass numbers of 63 and 65. The relative abundance and atomic masses are 69.2% for mass 62.93 amu, and 30.8% for mass 64.93 amu. Calcu late the average atomic mass of copper.

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