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Magnesium reacts with an element (X) to form an ionic compound. If the ground state electronic

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Magnesium reacts with an element (X) to form an ionic compound. If the ground state electronic configuration of (X) is 1s2 2s2 2p3, the simplest formula for this compound is

(a) Mg2X3

(b) MgX2

(c) Mg2X

(d) Mg3X2

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The correct option is: (d) Mg3X2

Explanation:

Electronic configuration of X is 1s2 2s2 2p3 .

So, valency of X will be 3.

Magnesium ion = Mg2+

Formula = Mg3X2

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