What percentage of 9 carat gold is gold?, 37.5, 42, 51.5, 66, What percentage of silver is in silver marked 900, 60, 80, 90, 95, which element mixed with carbon in diamonds makes them blue?, hydrogen, boron, nitrogen, nickel, Which elements may cause diamonds to be green?, hydrogen, nitrogen, or nickel, boron, nitrogen, or nickel, hydrogen or nitrogen, hydrogen, nitrogen, or zinc, Pure elements are made of only one type of molecules., True, False
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G7. 5.2: Pure Elements
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