Chemistry
What is the half-life of Potassium 40 as it decays to Argon?
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What is best described as the separation of a material into elements or parts?
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Selenium came from the Greek word "selene", which means what word in English?
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What is the symbol used on the periodic table for the element Fluorine?
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Which of the following can be described as a species with a high, concentrated, denotable charge density?
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What symbol appears on the periodic table for Magnesium which has the atomic number 12?
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Who is generally credited with discovering the electron?
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