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According to the aufbau principle3 which...

According to the aufbau principle3 which is the sequential order of filling subshells in a ground atom are completely filled ?

A

3s 3p 3d

B

3p 4s 3d

C

3d 4s 4p

D

4p 4d 4f

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GRB PUBLICATION-QUANTUM NUMBERS AND GENERAL CHEMISTRY-D.
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