Three elements X, Y and Z have consecutive increasing proton (atomic) numbers If element X is a noble gas what will be the symbol for the ion of element Z in its compounds ?
A
Z2−
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B
Z3−
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C
Z2+
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D
Z3+
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Solution
The correct option is CZ2+ X is noble gas belonging to group 18 and by increasing atomic no.Y belongs to group 1 and Z belongs to group 2 so its ion has valency two after losing two electrons it becomes a divalent cation.