Chemistry
What is known as the energy required to start a chemical reaction?
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Selenium came from the Greek word "selene", which means what word in English?
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What symbol appears on the periodic table for Plutonium which has the atomic number 94?
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What kind of cell has a negative EMF and a positive Gibbs free energy?
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How many elements in the actinide series are not radioactive?
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What gas in excited state is responsible for the bright red and yellow-green colors of the aurora?
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Which of the following is an abiotic factor in an environment?
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