Chemistry
What isotope of carbon can be used to figure out how old some objects are or when something died?
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A unit of measure of absorbed radiation is known as what?
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What is a mixture of gases that can be stored and transported like natural gas?
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Because they are so reactive with air and water, what group of elements are generally stored in oil?
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The Air-Quality Index measures exposure in the air at ground-level to which chemical?
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Which molecule may interact with cyclin dependent kinase?
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