Which of the following have their outermost shell completely filled with 8 electrons in
their structure?
Na", Cl, He, Ar, K, Br
(A) Na, Ar, He (B) Ar, CI
(C) CI, Ar, K (D) Ar, Nat, Br
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Answer:Option (A) is correct
Explanation:Na^+ means configuration of preciding element which is Argon. And other are all noble gases
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