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Chemistry
What is a vital constituent of plant and animal life, and is the key component of hemoglobin?
Chemistry
What is a vital constituent of plant and animal life, and is the key component of hemoglobin?
Manganese
Iron
Zinc
Calcium
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Which mineral is highly valued as an industrial flux?
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Berkelium on the periodic table is noted by which symbol?
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Who wrote the book "The Principles of Chemistry"?
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What would you call the treatment of disease, usually cancer, by chemical agents?
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What is the symbol used on the periodic table for the element Protactinium?
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