Three elements X,Y and Z have consecutive atomic numbers if element X is a noble gas what will be the symbol for the ion of element Z in its compound

As mentioned in the question, X is a noble gas therefore it lies in group 18 of the periodic table. Y and Z are consecutive elements thus element Z lies in the 2nd group. Thus, as per the electronic configuration it has 2 electrons in the outermost shell. Thus, it will lose 2 electrons to form Z2+ion.

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