Which of the following will violates Aufbau principle as well as Pauli's exclusion principle?

Question

Which of the following will violates Aufbau principle as well as Pauli's exclusion principle? (A) Option 1

(B)

(C)

(D) None of the above

Tardigrade Admin · Accepted Answer

Order of electron filling is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 ....... It should be 1s2 2s2 2p1 In this case 2 textp started filling before 2s, violating aufbau’s principle. In 2 textp textx two electrons have parallel spin. This violates pauli’s exclusion principle.

Q. Which of the following will violates Aufbau principle as well as Pauli's exclusion principle?

None of the above

Order of electron filling is

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ .......

It should be 1s² 2s² 2p¹

In this case $2 p$ started filling before 2s, violating aufbau’s principle.

In $2 p_{x}$ two electrons have parallel spin. This violates pauli’s exclusion principle.

Q. Which of the following will violates Aufbau principle as well as Pauli's exclusion principle?

None of the above

Order of electron filling is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 ....... It should be 1s2 2s2 2p1 In this case 2p started filling before 2s, violating aufbau’s principle. In 2px​ two electrons have parallel spin. This violates pauli’s exclusion principle.

Order of electron filling is

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ .......

It should be 1s² 2s² 2p¹

In this case $2 p$ started filling before 2s, violating aufbau’s principle.

In $2 p_{x}$ two electrons have parallel spin. This violates pauli’s exclusion principle.