A) \[\text{M}{{\text{g}}_{\text{2}}}\text{X}\]
B) \[\text{Mg}{{\text{X}}_{2}}\]
C) \[\text{M}{{\text{g}}_{2}}{{\text{X}}_{3}}\]
D) \[\text{M}{{\text{g}}_{3}}{{\text{X}}_{2}}\]
Correct Answer: D
Solution :
Sol. Element (X) electronic configuration \[1{{s}^{2}}\text{ }2{{s}^{2}}\text{ }2{{p}^{3}}\] So, valency of X will be 3. Valency of Mg is 2. Formula of compound formed by Mg and X will be\[\text{M}{{\text{g}}_{\text{3}}}{{\text{X}}_{\text{2}}}\].
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