Three of the following are true for minerals. Which one of the following is not true for minerals?
A) They have a specific, predictable chemical composition.
B) They have an orderly internal crystalline structure.
C) They can be identified by characteristic physical properties.
D) They can be a liquid, solid, or gas.
Question 2
You are handed a sample of an unknown silicate mineral. Which two elements must it contain?
A) silicon and oxygen
B) iron and silicon
C) carbon and hydrogen
D) silicon and sodium
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