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Question

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 C Z2+
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.

Hence, the correct option is C

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