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According to the Aufbau principle, which is the sequential order of filling subshells in a ground state atom?

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3p 4s 3d

4p 4d 4

3d 4s 4p

3s 3p 3d

answer is B.

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Detailed Solution

The sequential order of filling subshells in a ground state atom is 3p 4s 3d

According to the Aufbau principle, an electron fills orbitals in ascending energy sequence.

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