According To The Aufbau Principle The Correct Order Of Energy Of 3d, 4s And 4p Orbitals Is: (A) 3d < 4s < 4p.(B) 4s < 3d < 4p.(C) 4s < 4p < 3d.(D) 4p < 3d < 4s

The correct answer is (B) 4s < 3d < 4p.

According to the Aufbau principle, in the ground state of the atoms, the orbitals are filled with electrons to increase energy.

Therefore, the correct order of energy of 3d, 4s and 4p-orbitals is 4s < 3d < 4p.

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