+**4f0** represents a specific quantum state where the 4f [Electron Orbital](/wiki/Electron_Orbital) contains zero electrons. This configuration is foundational in describing the electronic structure of elements, particularly those preceding the [Lanthanides](/wiki/Lanthanides) series. It signifies an empty subshell, profoundly influencing an atom's chemical behavior.
+## See also
+- [Atomic Structure](/wiki/Atomic_Structure)
+- [Quantum Mechanics](/wiki/Quantum_Mechanics)
+- [Periodic Table](/wiki/Periodic_Table)