What is electronic cfg?

Electronic configuration (cfg) is the distribution of electrons in the various energy levels or orbitals of an atom. It defines the number of electrons in the outermost shell, which controls the chemical properties of the element. The electronic configuration of an element is represented by the notation of the number of electrons in each sub-shell or orbital, where each sub-shell consists of one or more orbitals. The order of filling of orbitals follow the Aufbau principle, Hund's rule and Pauli exclusion principle. Electronic configurations are used to predict the reactivity, chemical properties and behavior of elements in different chemical changes and reactions.