Chemistry

What was the fifth unearthly element from the days of Aristotle?

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Clocks made out of what alkali metal are considered the most accurate of all clocks?
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What gas makes up most of the atmosphere of Mars?
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What is 37 degrees Celsius in Fahrenheit?
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What is table salt's chemical name?
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What isotope of carbon can be used to figure out how old some objects are or when something died?
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What does the word "oxygen" mean?
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Which of these elements has the highest density?
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What two common ingredients cause an observable chemical reaction when mixed?
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