Answer:
An electron is transferred from one atom to another.
Explanation:
Ionic bonds are formed between cations and anions. When an electronegative atom gains an electron from an electropositive atom, the former becomes negatively charged anion while the later atom acquires a positive charge and is called cation.
The opposite charges of anion and cation attract each other and join them by an ionic bond. Example: Na+ and Cl- ions are bonded together by ionic bond and form NaCl.
