* Covalent Bonds: In a covalent bond, atoms share electrons to achieve a stable electron configuration. They don't fully transfer electrons like in ionic bonds.

* Ions: Ions are formed when an atom gains or loses electrons, resulting in a net positive or negative charge.

Here's the key difference:

* Ionic bonds: Involve the complete transfer of electrons, creating positively charged cations and negatively charged anions.

* Covalent bonds: Involve the sharing of electrons between atoms. The shared electrons are attracted to the nuclei of both atoms, holding them together.

Example:

* Ionic Bond: Sodium chloride (NaCl). Sodium loses an electron to become a positively charged sodium ion (Na+), while chlorine gains an electron to become a negatively charged chloride ion (Cl-). The electrostatic attraction between these oppositely charged ions forms the ionic bond.

* Covalent Bond: Water (H2O). Each hydrogen atom shares an electron with the oxygen atom, creating a stable molecule with no ions.

In summary, covalent bonds involve electron sharing, not electron transfer, so they do not create ions.