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.

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Solution

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

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

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