Chemistry Question (elements)

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Indicate which of the following elements do not exist in nature in the elemental state (that is, they only exist in the combined state of being in compounds with other elements): Cl, K, S, Al, Ar, N
A. S, Ar, N
B. Ar only
C. Cl, K, Al
D. Cl only
E. Cl, K

  • Chemistry Question (elements) -

    Which of the elements listed are the highest in activity. Look at the periodic table. Is K fairly reactive?

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