A. Nitrogen
B. Hydrogen
C. Oxygen
D. Fluorine
Correct Answer:
Option C = Oxygen
Explanation
Oxygen, O2, is by far the most abundant element in earth’s crust at 46.6 percent, nearly half of the mass of the crust.
A. Nitrogen
B. Hydrogen
C. Oxygen
D. Fluorine
Correct Answer:
Option C = Oxygen
Explanation
Oxygen, O2, is by far the most abundant element in earth’s crust at 46.6 percent, nearly half of the mass of the crust.
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