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Structure Of Atom

Question

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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

Mg₂X₃

MgX₂

Mg₃X₂

Mg₂X

Solution

C.

Mg₃X₂

Element (X) electronic configuration

1s² 2s² 2p³

So, valency of X will be 3.
Valency of Mg is 2.
Formula of the compound formed by Mg and X
will be Mg₃X₂

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