Electron configuration notation is a method used to represent the arrangement of electrons within an atom. It describes the distribution of electrons among the energy levels, sublevels, and orbitals within an atom. The notation follows a specific format: It starts with the principal quantum number (n), representing the main energy level or shell, followed by the sublevel designation (s, p, d, f) representing the type of orbital, and finally, the number of electrons present in that orbital. For instance, the electron configuration of carbon (C) is written as 1s² 2s² 2p², representing: 1s²: Indicates that there are 2 electrons in the 1s orbital (n=1). 2s²: Represents 2 electrons in the 2s orbital (n=2). 2p²: Denotes 2 electrons in the 2p orbital (n=2). This notation system provides a structured way to represent how electrons are arranged in shells and orbitals within atoms, aiding in understanding an element’s chemical properties and behavior.