Ek Parmanu ka electronic Vinyas 2, 8 ,7 Hai is tatva ki Parmanu sankhya ka Sanket kya hai
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K2 M8 N7
=> 1s2 2s2 2p6 3s2 3p5
=> Z = 17
=> Atom : Cl (Chlorine)
=> please mark me if you are satisfied with my answer...
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