A. The electron configuration for nitrogen is 1 s 2 2 s 2 2 p 3 , so it has five

Question

             

                A. The electron configuration for nitrogen is 1s22s22p3, so it has five valence electrons.                 B. Main-group elements in the same group have the same number of valence electrons.                 C. The elements in the s-block can have up to two valence electrons.                 D. The group numbers of the main-group elements are the sum of the number of s and p valence electrons.                 E. An element in Group IVA will have six valence electrons.

Explanation / Answer

E

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