Chemistry

How many elements in the actinide series are not radioactive?

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What is the most common chemical element found in the Earth's atmosphere?
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Which element has the chemical symbol Ca?
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In an ethyne molecule, what is the hybridization of each of the carbons?
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What is the symbol used on the periodic table for the element Fluorine?
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What is a mixture of gasoline and ethanol called?
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What are chemicals that reduce or prevent oxidation called?
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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 is the IUPAC name for toluene?
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