Question

Which rule is violated in the electronic configuration 1s^0,2s^2,2p^6 how
?

Answer 1

Answer:

This type of electron filling in the orbitals violates

AUFBAU'S PRINCIPLE

Explanation:

Aufbau's Principle states that in a ground state (non-excited) , electrons get filled first in the lower energy orbitals and then onto the higher energy orbitals .

The energy order of few orbitals can be given as :

1S < 2S < 2P < 3S <3P < 4S < 3D ......

This energy is assigned as per the (n+l) rule.

But in this case we can clearly see that electrons have filled in higher orbitals (2S and 2P) before getting filled into 1S.

So this kind of orbital filling is not possible and hence violates Aufbau's rule.

Answer 2

Answer :-----

→ Aufbau Principle rule is violated in the electronic configuration 1s^0,2s^2,2p^6.........

Explaination :------

→ Aufbau Principle is violated as the orbital having lower energy must be filled first. So 1s1s could not be vacant in

1s^० , 2s², 2p^6 ....

→ An electron having the lowest value of (n+l) will be filled first.

→ The Aufbau principle states that electron's occupy orbitals in order of increasing energy.

The order of occupation is as follows:

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

→ Orbitals with a lower n + ℓ value are filled before those with higher n + ℓ values......

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