Chemistry
How many elements in the actinide series are not radioactive?
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What is the symbol used on the periodic table for the element Protactinium?
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Which of the following is produced in alkaline scrubbing and called wet slurry?
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Which of these can take on either a positive or negative charge, typically being a protein?
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What is the name for naturally-occurring alloy of gold and silver with a small amount of other metals?
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Approximately how many toxic chemicals are released while a diesel engine idles?
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What is the symbol used on the periodic table for the element Promethium?
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