The ion at the center of a silicate tetrahedron is surrounded by _________.
A) 4 sodium ions
B) 6 sodium ions
C) 6 oxygen ions
D) 4 oxygen ions
Correct Answer:
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Q14: All silicate minerals contain _and_ .
A)iron; silicon
B)silicon;
Q15: What element is the most abundant in
Q16: Ruby and sapphire are red and blue
Q17: Which of the following minerals is in
Q18: What are the lightest or least massive
Q20: Which of the following is an accurate
Q21: _has the highest specific gravity.
A)Water
B)Quartz
C)Wood
D)Gold
Q22: Which one of the following is a
Q23: What is the name of the dark-
Q24: What mineral is the hardest known substance
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