Question

When 3d orbitals are completely filled then the next electron will enter?

Answer 1

Hi there ,

☆ The next sublevel after 3d is 4P

Electrons occupies sublevel according the Aufbau Principle which is 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 .......

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