The most abundant element in the earth's crust is
A) silicon.
B) iron.
C) oxygen.
D) sodium.
Correct Answer:
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Q12: In terms of composition,nine elements compose approximately
Q13: The majority of metals and minerals come
Q14: The second most abundant element in the
Q15: Which of the following correctly summarizes the
Q16: The three major structural parts of the
Q18: The lithosphere is the _ part of
Q19: The basic unit of silicates is
A)SiO.
B)SiO₂.
C)SiO₃.
D)SiO₄.
Q20: Carbonates are composed of
A)carbon and oxygen.
B)carbon, oxygen
Q21: Which material is characterized by a well-ordered,three-dimensional
Q22: Which of the following is NOT a
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