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    Question

    Which element dominates the Earth's crust by

    percentage?
    A Iron Correct Answer Incorrect Answer
    B Silicon Correct Answer Incorrect Answer
    C Potassium Correct Answer Incorrect Answer
    D Aluminium Correct Answer Incorrect Answer

    Solution

    Silicon, second only to oxygen, constitutes about 28% of the Earth's crust by weight. It is a primary component of sand and quartz, making it a significant element in the geological composition of the planet.

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