That is chlorine and it has seven valance electrons.
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The electron configuration is gallium, which has 3 valence electrons so I think it's three.
Valence electrons refer only the those electrons in the OUTERMOST shell. In the case shown, that would be the 3rd shell which has 3s2 and 3p1 for a total of 3 valence electrons.
The electron configuration of sulfur is [Ne) 3s2.3p4.
The most electronegative element is fluorine. Its electron configuration is 1s2 2s2 2p5.
The answer is nitrogen. Nitrogen is one example of an element that has the same valence electron configuration as phosphorus.Ê
This group has the electron configuration of sulfur. The element sulfur has 16 electrons, and its electron configuration is 1s2 2s2 2p6 3s2 3p4.
Ra, radium