Objective: To use data for two or more isotopes (percent abundance and atomic mass) to determine the average atomic mass of an unknown element.
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Average Atomic Mass
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Determine the average atomic mass of an extraterrestrial element having three isotopes.
Determine the average atomic mass of an extraterrestrial element having two isotopes.
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Determine the average atomic mass of an unknown element having two isotopes.
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Determine the average atomic mass of an unknown element having three isotopes.
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Here is a random sample of 100 atoms of an unknown element. The relative mass of each atom is listed. You will need to determine the average atomic mass - that is, the weighted average of all the masses.
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Use the data to calculate the average atomic mass (in amu). Enter the value and tap Check Answer.
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