Question

Three elements, x, y, and z, have consecutive increasing atomic numbers. If element x is a noble gas, what will be the symbol for the ion of element z in its compounds?.

Answer 1

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 Z^2+