Question

explanation of 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. For example, the 1s shell is filled before the 2s subshell is occupied

Answer 2

hey dear here is your answers
aufbau principle simply but means electrons
are added to orbitals as proton added to an atom the term comes from the German word
aufbau which means build up,or construction
lower electron orbitals

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