Chemistry
What symbol appears on the periodic table for the element with the atomic number 70?
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What symbol appears on the periodic table for the element with the atomic number 22?
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What is the approximate heat of vaporization of water at its boiling point?
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What element, used in some types of paint, created a health risk to children who ate paint chips?
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Which of the following is found in stinging insects?
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Analysis of the black soot left over from a fire would reveal what primary element?
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What radioactive metallic element, found in all uranium ores, has an atomic number of 89?
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