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Why Is 3D Written Before 4S? [Solved]
So if we look at the energy levels, 3d orbital has a higher energy level than 4s orbitals. Hence, electrons fill up in 4s before 3d orbital. The Aufbau principle also describes this properly.
Why | 4s is filled before 3d | Electrons enter into 4s instead of 3d | Electron Configuration
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Why is 4s before 3d for electron configurations?
1s 2s 2p 3s 3p
Why 4s before 3d
This podcast is a attempt to answer a question that’s been puzzling many chemistry students and that is why does the
