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2015-07-06T20:50:39+08:00

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44.8% oxygen, 21.5% silicon, and 22.8% magnesium. There’s also iron, aluminum, calcium, sodium, and potassium.
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2015-07-06T20:54:24+08:00

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The elements make up the mantle .. their are iron,magnissium,silicon and oxygen. thats all. no other element
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