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Which of the following is NOT a difference between a compound and a mixture?
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1. Intro to General Chemistry
Classification of Matter
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Which of the following best describes a silicate?
A
A pure element composed only of silicon atoms.
B
A compound containing silicon and oxygen atoms, typically arranged in a tetrahedral structure.
C
A mixture of sodium and chloride ions.
D
A solution of silicon dioxide dissolved in water.
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Understand the definition of a silicate: Silicates are minerals or compounds that contain silicon and oxygen atoms bonded together.
Recall that silicon atoms in silicates are typically arranged in a tetrahedral structure, where one silicon atom is surrounded by four oxygen atoms.
Recognize that silicates are not pure elements; pure silicon would be just silicon atoms without oxygen.
Note that silicates are not mixtures of sodium and chloride ions, which describe common salt (NaCl), nor are they solutions of silicon dioxide dissolved in water.
Conclude that the best description of a silicate is a compound containing silicon and oxygen atoms, typically arranged in a tetrahedral structure.
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