NEET Solved Paper 2018 Question 43
Question: 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 [NEET - 2018]
Options:
A) $ M{g_2}X $
B) $ Mg{X_2} $
C) $ M{g_2}{X_3} $
D) $ M{g_3}{X_2} $
Show Answer
Answer:
Correct Answer: D
Solution:
Sol. Element (X) electronic configuration $ 1s^{2}2s^{2}2p^{3} $
So, valency of X will be 3. Valency of Mg is 2.
Formula of compound formed by Mg and X will be $ M{g_3}{X_2} $ .
