OnlineCBT
Chemistry · PYQ NEET UG 2018
हिन्दीMagnesium reacts with an element (X) to form an ionic compound. If the ground state electronic configuration of (X) is \( 1\text{s}^2 2\text{s}^2 2\text{p}^3 \), the simplest formula for this compound is
Correct answer · Option 4
\( \text{Mg}_3\text{X}_2 \)
Explanation
Element X has configuration \( 1\text{s}^2 2\text{s}^2 2\text{p}^3 \) (Nitrogen family, valency 3, forming \( \text{X}^{3-} \)). Magnesium forms \( \text{Mg}^{2+} \). By cross-valency, the formula is \( \text{Mg}_3\text{X}_2 \).
