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A toxic, reddish-brown liquid halogen is ____.
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bromine (Br)
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Atoms of H, Li, ____, and K each have one valence electron.
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calcium (Ca)
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The metal with the highest electrical conductivity is ____.
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copper (Cu)
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Chalk, limestone, and marble contain ____ carbonate.
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fluorine (F)
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When an electric current is passed through ____ it glows red.
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neon (Ne)
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Common oxidation states for carbon (C) and ____ are -4 and +4.
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silicon (Si)
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Bronze is an alloy of mostly ____ mixed with tin (Sn).
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silver (Ag)
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The most reactive and electronegative element is ____.
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sodium (Na)
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