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Elements X and Y form an ionic compound with chemical formula X2Y. If the ion of X and the ion of Y have the same electronic arrangement, which of the following may this compound be? A. sodium oxide B. aluminium sulphide C. sodium sulphide D. magnesium chloride

解答 0

  • tayh
    2019-06-27 00:32:58
    charge of ion of X is 1+, charge of ion of Y is 2-
    the ion of X and the ion of Y have the same electronic arrangement= they are of the same period (ie. have the same no. of electron shells)
    From the 4 options, only sodium ions has the charge 1+
    so only A or C is possible
    From the periodic table, sulphur is the same period as sodium, and sulphide ion has a charge of 2-
    so the answer is C. sodium sulphide
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