Chemistry
What is the most common chemical element found in the Earth's atmosphere?
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What is the second most abundant element by mass (about 18.5%) in the human body?
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What is the most abundant halogen found in the Earth's crust?
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What element is the most ductile of the pure metals, but is less malleable than gold?
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What symbol appears on the periodic table for the element with the atomic number 66?
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What is the name for naturally-occurring alloy of gold and silver with a small amount of other metals?
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Which of the following structures best characterizes glass?
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