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    5. Which element is most abundant by mass in the earth's crust?

    Question

    Which element is most abundant by mass in the earth's

    crust?
    A Iron Correct Answer Incorrect Answer
    B Silicon Correct Answer Incorrect Answer
    C Oxygen Correct Answer Incorrect Answer
    D Carbon Correct Answer Incorrect Answer

    Solution

    Oxygen constitutes about 46.6% of the Earth's crust by weight, making it the most abundant element.

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    Relevant for Exams:

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