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Bonus question #2: Unknown element, Element X, exists in nature as two isotopes:
^{351}
351

X has a mass of 350.9196 u and
^{353}
353

X has a mass of 352.9209 u. The average atomic mass of Element X is 351.96 u. Calculate the relative abundance of the two Element X isotopes.

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Answer:

Explanation:

your answer is 351.96 i not a 100 per sent right but that should be it

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