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  1. D

    Comparing the compositions of binary ionic and binary molecular compounds?

    I need a bit of help, i don't understand Chemistry (obviously).
  2. D

    what is the electron configurations for the 2+ cations of these elements?

    A. Fe B. Co C. Ni
  3. D

    which of the following pairs of elements will not form ionic compounds?

    A. sulfur and oxygen B. sodium and calcium C. sodium and sulfur D. oxygen and chlorine ????
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