Question:

Number of elements forming most of the minerals of earth's crusts is?

by  |  earlier

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a) 250

b none of the above?

c 25

d 8

e 2500

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1 ANSWERS


  1. d, 8

    Oxygen

    Silicon

    Aluminum

    Iron

    Calcium

    Sodium

    Potassium

    Magnesium

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