The Total Number Of Electrons In A Nitrogen Atom And A Chlorine Atom Are 7 And 17 Respectively. Find The Number Of Valence Electrons In Them.

Nitrogen has an atomic number of 7. The electronic configuration of nitrogen(N) is 1s2,2s2,2p3 (or) 2,5. The last shell has 5 electrons. Thus nitrogen (N) has 5 valence electrons.

Chlorine has an atomic number of 17. The electronic configuration of chlorine(Cl) is 1s2,2s2,2p6,3s2,3p5 (or) 2,8,7. The last shell has 7 electrons. Thus chlorine(Cl) has 7 valence electrons.

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