Q. Magnesium reacts with an element (X) to form an ionic compound. If the ground state electronic configuration of (X) is $1s^2 2s^2 2p^3$, the simplest formula for this compound is
A) $Mg_2X$
B) $MgX_2$
C) $Mg_2X_3$
D) $Mg_3X_2$
Explanation
[Solution] X is nitrogen ($N^{3-}$); with $Mg^{2+}$ it forms $Mg_3N_2$. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.