Question Detail

CHM 101 Atoms and Atomic Theory Objective Question

Question

Which of the following correctly represents the formation of an ionic compound from its elements?
Options
A Mg + Cl2 → MgCl2
Correct Answer
B H2 + O2 → H2O
C C + O2 → CO2
D N2 + H2 → NH3
Correct Answer

Option A is the correct answer.

Detailed Explanation

In the reaction Mg + Cl2 → MgCl2, magnesium (a metal) loses electrons to form Mg2+ cations, and chlorine (a nonmetal) gains electrons to form Cl- anions. The electrostatic attraction between these oppositely charged ions forms the ionic compound magnesium chloride.

Hint

Ionic compounds typically form between a metal and a nonmetal through electron transfer.

Question Info