Where l = 0, 1, 2, 3 for s, p, d, f orbitals. The maximum number of the electron in sub-shell like s, p, d, and f orbitals = 2(2l + 1). The maximum number of electrons in the main energy levels = 2n 2, where n = principal quantum number. The filling up electronic orbitals with electrons around the nucleus of atoms takes place according to certain rules. According to above diagram structure, configuration energy levels with electron constructed the following ordering, 1s < 2s < 2p < 3s < 3p < 4s < 3d < 4p < 5s < 4d < 5p < 6s < 4f < 5d < 6p < 7s < 5f… Filling up the different orbitals by the number of electrons will follow these lines configuration.Now inclined parallel lines are drawn through the electronic orbitals according to the above picture.The different electron orbitals originating from the same electronic energy levels are written in horizontal lines.Therefore, the trivial way but most convenient way to remember these electronic energy levels is given below the diagram. The hydrogen atom contains only one electron in 1s hydrogen energy levels with electronic configuration 1s 1.īut difficult for readers to remember the electron energy levels diagram for many electronic configurations.

The energy associated with a certain energy level increases with the increase of its distance from the nucleus. What are electron energy levels?Įnergy levels are fixed distances where electrons are rotating around the nucleus with definite energy. The modern periodic table classification like s, p, d, and f block elements is based on properties and general electron or electronic configuration of elements. For example, 3s orbital has lower energy than 3p orbitals which again lower energy than the 3d level. To find the electron configuration formula first we find the order of electronic energy levels of s, p, d, and f orbitals or sub-levels.

Hence the organic and inorganic chemical reactions are better understood by the electronic configuration of elements. Oxidizing reducing properties, oxidation number, ionization energy, electron affinity, shielding effect, the polarity of chemical bonds, acids bases properties can be explained by the electronic configuration.Ī reaction to reach chemical equilibrium is the change of electron configuration of reactant and product atoms.

Ti electron configuration