Question

State and explain aufbau rule

Answer 1

The Aufbau principle, simply means electrons are added to orbitals as protons are added to an atom. It states that the electron in an atom are arranged so that They occupy orbitals in the order of their increasing energy. The Aufbau principle shows the rules which describe how electrons are organized into shells and subshells around the nucleus (of an atom). This principle also states that the orbital with the lowest energy will be filled first.

Answer 2

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Aufbau principle

Aufbau is a German word which means building up or construction

Statement : In the building up of atoms the electrons enters into the various orbitals in the increasing order of the their energies

The orbital with the lower energy is filled up first followed by the orbitals of higher energy