Chemistry
What actinide was once used to power pacemaker batteries, but has since been replaced?
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What solution contains the same ratio of chemical constituents after it is distilled?
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What is a chemical or physical agent that tends to cause cancers?
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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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What symbol appears on the periodic table for the element with the atomic number 22?
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What symbol appears on the periodic table for Plutonium which has the atomic number 94?
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