Chemistry
What radioactive metallic element, found in all uranium ores, has an atomic number of 89?
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When cutting onions what is released in the air that makes a person tear?
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What is a method to indicate reactants and products of a chemical reaction using chemical formulas?
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The temperature at which gas becomes liquid is considered what?
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What is the symbol used on the periodic table for the element Promethium?
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Mendelevium on the periodic table is noted by which symbol?
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Which of the following structures best characterizes glass?
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