Chemistry
What symbol appears on the periodic table for Calcium which has the atomic number 20?
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A critical component of vitamin B-12, what element is the only metal found in vitamins?
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What precious metal is most commonly used in catalytic converters for cars?
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What is a compound or mixture of chemical compounds that is used to maintain a steady pH?
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What compounds that are soluble in water are classed as bases?
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Inhaling what gas temporarily makes the sound of a person's voice squeaky?
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The study of composition and properties of substances and matter is called?
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