Answer to Question #223577 in General Chemistry for app

Question

sir i pls explain aufbau principle and electronic configuration

Answer 1

The aufbau principle, from the German Aufbauprinzip, also called the aufbau rule, states that in the ground state of an atom or ion, electrons fill atomic orbitals of the lowest available energy levels before occupying higher levels. For example, the 1s subshell is filled before the 2s subshell is occupied.

Electronic configuration, also called electronic structure, the arrangement of electrons in energy levels around an atomic nucleus.