Here's a breakdown:

* Covalent bonds occur when two atoms share one or more pairs of electrons. This sharing allows both atoms to achieve a stable electron configuration, similar to noble gases.

* Ionic bonds, on the other hand, involve the transfer of electrons from one atom to another, resulting in the formation of ions (charged particles).

Covalent bonds are very common in organic molecules, like water (H₂O) and methane (CH₄). They can be single, double, or triple bonds, depending on how many electron pairs are shared.