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Question

When 3d orbital is complete, the next entering electron goes into :

A
4 f
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B
4s
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C
4 p
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D
4 d
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Solution

The correct option is C 4 p
When 3d orbital is complete the next entering electron goes into 4p level.
The order of increasing energies is 1s,2s,2p,3s,3p,4s,3d,4p,5s,4d,5p,6s

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