Its electron dot diagram is as follows: S.e: S. Valence electrons of Elements (List) Here is the list of periodic table of elements with their valence electrons. In the highest-numbered shell, the n 4 shell, there are six electrons. The valence electron configuration for selenium is 4 s 2 4 p 4. \) can both react with water, but K has a more radical reaction because it has more shells of core electrons which makes the valence electron in its outermost orbital much easier to lose than the valence electron of Na. So it would have three dots around the symbol for aluminum, two of them paired to represent the 3 s electrons: Al: A l. Now I’ll show you the complete list of elements with electrons per shell.
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