An element 12X24 loses two electrons to form a cationwhich combines with the anion of element 17Y35 formed by gaining an electron.
1) write the electronic configuration of element X
2)​write the electronic configuration of anion of element Y
3) write the formula of the compound formed by the combination of X and Y.

1. Electronic configuration of X : 2,8,2
2. Electronic configuration of Y : 2,8,7
3. XY2

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