Which two elements are the most abundant in the Earth’s crust? A. silicon and oxygen B. silicon and magnesium C. iron and nickel D. iron and

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Which two elements are the most abundant in the Earth’s crust? A. silicon and oxygen B. silicon and magnesium C. iron and nickel D. iron and magnesium

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  2. Answer: A. silicon and oxygen

    Explanation:

    The two most abundance elements in earth’s crust are silicon and oxygen.

    The most abundant element in earth’s crust is Oxygen (O) which has a percentage composition of 46.6%.  Oxygen is mainly present as silicates, carbonates, sulphates etc.

    The second most abundant element in earth’s crust is Silicon (Si) which has a percentage composition of 27.7%
    . Silicon is present in the form of silicates.

    The third most abundant element in earth’s crust is aluminium (Al) which has a percentage composition of 8.1 %.

    The fourth most abundant element in earth’s crust is Iron (Fe) which has a percentage composition of 5.0 %.

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