46.6% Oxygen (O) 27.7% Silicon (Si) 8.1% Aluminum (Al) 5.0% Iron (Fe) 3.6% Calcium (Ca) 2.8% Sodium (Na) 2.6% Potassium (K) 2.1% Magnesium (Mg) > Consider the layers of the Earth seen here. Where would you find the elements listed above? A) atmosphere B) core C) crust D) mantle

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