Chemistry
What isotope of carbon can be used to figure out how old some objects are or when something died?
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What compounds that are soluble in water are classed as bases?
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What is the fifth most abundant element in the universe after hydrogen, helium, oxygen and carbon?
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What is the symbol used on the periodic table for the element Promethium?
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Which one of the following countries' names is derived from the element silver?
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What transition metals are the only elements known to produce a magnetic field?
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