Question

what is afbau rule, with example

Answer 1

electronic configuration can be determined by using 1s 2s 2p 3s 3p 4s 3d ...........

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Answer 2

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Here is your answer

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