What is Aufbous rule?

Answer 1

Aufbau's rule is a principle in quantum chemistry that describes the order in which electrons populate atomic orbitals. According to this rule, electrons fill orbitals starting from the lowest energy level and move to higher energy levels, following the order defined by the Aufbau principle. This often follows the sequence of increasing energy levels, typically represented by the n + l rule, where n is the principal quantum number and l is the azimuthal quantum number. As a result, this helps in predicting the electron configuration of atoms.