Chemistry
What is the symbol used on the periodic table for the element Francium?
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What is a chemical or physical agent that tends to cause cancers?
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A compound or molecule that is composed of carbon, oxygen and hydrogen best fits which science term?
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What two common ingredients cause an observable chemical reaction when mixed?
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What is the most abundant halogen found in the Earth's crust?
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What is a compound or mixture of chemical compounds that is used to maintain a steady pH?
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