Chemistry
What group of elements include lithium, sodium, potassium, rubidium, cesium, and francium?
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Which of these is a heavy gas used in specialized electric lamps?
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Which of the following is used as a rating scale to grade gasoline?
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What is the breakdown of a material by separation of the layers of which it is composed called?
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While acids dissolve most metals, what special mixture of acids is used to dissolve gold?
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What is the second most common metal on Earth, and the most widely-used metal?
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Acetic acid gets its name from which of the following?
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