Chemistry
What is a vital constituent of plant and animal life, and is the key component of hemoglobin?
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Berkelium on the periodic table is noted by which symbol?
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Which of the following is not a common brominating agent?
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What group of elements include lithium, sodium, potassium, rubidium, cesium, and francium?
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The noble gases that make up Group XVIII of the periodic table is also known as which of the following?
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What is the symbol used on the periodic table for the element Aluminum?
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