What is the auf bau principle?

Answer 1

The Aufbau principle is a fundamental concept in quantum mechanics that describes the order in which electrons populate atomic orbitals. According to this principle, electrons fill the lowest energy orbitals first before moving to higher energy levels. This ordering helps predict the electron configuration of an atom, which in turn influences its chemical properties. The principle is often summarized by the phrase "building up," reflecting the sequential addition of electrons.