Answer: A. Compound
Explanation: Most gems are non-metallic compounds. The mineral quartz (SiO2) is a non-metallic crystalline compound (see Figure 1-9).
Answer:
compound is the answer
he's/she's right
Explanation: correct if I'm wrong
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Answer: A. Compound
Explanation: Most gems are non-metallic compounds. The mineral quartz (SiO2) is a non-metallic crystalline compound (see Figure 1-9).
Answer:
compound is the answer
he's/she's right
Explanation: correct if I'm wrong