Question

What is Aufbau principle???​

Answer 1

The aufbau principle 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. ... In this way, the electrons of an atom or ion form the most stable electron configuration possible

Answer 2

$\huge\bold{Aufbau\: principle}$

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»»» It states that , In the ground state of an atom, an electron enters the lowest orbital of lowest energy first and subsequent electrons are fed in the order of increasing energies.

»»» "Aufbau" is a German word which mean building up...

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Hope it helps you outツ