F-orbitals are a type of atomic orbital that can hold electrons in an atom. They are more complex in shape than s, p, and d orbitals and are characterized by their unique angular momentum. F-orbitals can accommodate a total of 14 electrons, as there are seven different f-orbitals, each capable of holding two electrons. These orbitals are primarily found in the lanthanide and actinide series of the periodic table. F-orbitals play a crucial role in the chemical properties of these elements, influencing their reactivity and bonding behavior. Understanding f-orbitals is essential for studying transition metals and their compounds.