9. What element is the most abundant in the Earth's crust? a. Hydrogen b. Sodium d. Oxygen hoke and minerals c. Iron d. oxygen
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9. What element is the most abundant in the Earth's crust? a. Hydrogen b. Sodium d. Oxygen hoke and minerals c. Iron d. oxygen
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Answer:
Oxygen
Explanation:
A Oxygen which compose about 49.5% of the total mass of the Earth crust, water and atmosphere, according to the textbook
'Modern Chemistry'