An ionic compound is formed due to transfer of one or more electrons from a metal atom to a non metal atom.
During the formation of the compound, a metal atom loses electrons and forms a positively charged ion known as cation. The electrons lost by the metal atom are accepted by the non metal atom. The non metal forms a negatively charged ion known as anion.
These oppositely charged ions are attracted to each others due to the electrostatic forces of attractions. As a result, an ionic bond is formed.
Based on the above discussion, the correct order of events is given below.
B – Atoms donate and receive electrons.
D – Anions and cations are formed.
A – Oppositely charged ions attract.
C – Charges of ions balance one another.