Chemistry

Which of these is an element?

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What alkali metal is highly radioactive and decays into either astatine, radium, or radon?
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What transition metals are the only elements known to produce a magnetic field?
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Which of these elements has the highest density?
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What is the usual ounce capacity of a jigger?
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Which of the following is not used in a chemistry lab?
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What will happen to most matter that is heated?
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What are electrically charged atoms called?
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What is the half-life of Potassium 40 as it decays to Argon?
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