how many and what isotopes form nearly 50% of earth crust.?
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Answer:
Given the abundance of oxygen and silicon in the crust, it should not be surprising that the most abundant minerals in the earth's crust are the silicates.
Explanation:
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2
Answer:
Oxygen
Explanation:
Oxygen 46.6
Silicon 27.7
Aluminum 8.1
Iron 5.0
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