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  3. Chemistry
  4. Magnesium reacts with an element (X) to form an ionic compound. If the ground state electronic configuration of ( X ) is 1 s 2 2 s 2 2 p 3, the simplest formula for this compound is

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Q. Magnesium reacts with an element $(X)$ to form an ionic compound. If the ground state electronic configuration of $( X )$ is $1 s ^{2} 2 s ^{2} 2 p ^{3}$, the simplest formula for this compound is

NEETNEET 2018The s-Block Elements

Solution:

Element $(X) $ electronic configuration

$1 s^{2} \,2 s^{2} \,2 p^{3}$

So, valency of $X$ will be $3$ .

Valency of $Mg$ is $2$ .

Formula of compound formed by $Mg$ and $X$ will be $Mg _{3} X _{2}$