Question

Expalin Aufbau principle?​

Answer 1

Answer:

heya ✌️✌️

Explanation:

Aufbau principle:

It 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.

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Answer 2

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✿ The word 'Aufbau' in German means ''building up '.The building up of Orbital means the filling up of orbitals with electrons .

✿ The principle states that ; "In the ground state of atoms, the orbitals are filled in order of their increasing energy .

✿ In other words, Electrons first occupy the lowest energy orbital available to them and enter into higher energy orbitals only after the lower energy orbitals are filled .

✿ The order in which energies of the orbitals increase and hence the order in which the orbitals are filled is as follows ;

1s,2s,3s,3p,4s,3d,4p,5s,4d,5p,4f,5d,6p,7s,...

✿ The order may be remembered by using the method given in above figure ; starting from the top, the direction of the arrow gives the order of filling of orbitals ,that is starting from right top to bottom left .