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28 June, 14:38

How many energy sublevels are in the second principal energy level?

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  1. 28 June, 17:09
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    There are two energy sublevels in the second principal energy level. These two energy sublevels are 2s and 2p. The energy distribution in an atom is divided into a number of principal energy levels, and the principal energy levels are again divided into four basic energy sublevels.
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