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Dear student,
The shell number 1,2,3 and 4 corresponds to the shell K, L, M and N.
The maximum number of electrons that can be placed in K, L and M is 2, 8 and 18, respectively.
Accordingly, the electrons are distributed in the shells for the given elements.
Valence electrons are the number of electrons present in the outermost shell.
Therefore, the number of valence electrons of nitrogen, oxygen, sodium, magnesium, silicon and sulfur is, 5, 6, 1, 2, 4, and 6, respectively.
The shell number 1,2,3 and 4 corresponds to the shell K, L, M and N.
The maximum number of electrons that can be placed in K, L and M is 2, 8 and 18, respectively.
Accordingly, the electrons are distributed in the shells for the given elements.
Valence electrons are the number of electrons present in the outermost shell.
Therefore, the number of valence electrons of nitrogen, oxygen, sodium, magnesium, silicon and sulfur is, 5, 6, 1, 2, 4, and 6, respectively.
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