Chemistry

What alkali metal is highly radioactive and decays into either astatine, radium, or radon?

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Which substance has NaCl as its chemical formula?
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Which of the following subshells has the highest energy?
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What alkali metal is used in batteries and certain medicines?
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A water molecule cannot hydrogen bond to which of the following?
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What element was discovered as a component of the debris of the first hydrogen bomb explosion?
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Which of the following is used as a rating scale to grade gasoline?
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What does the gall bladder secrete?
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What particle has a positive charge of 1 unit?
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