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Introduction to d and f Block Elements

What are the ...

Question

What are the electronic configuration of $N a^{+}$ and $C l^{-}$ ions?

N a^{+} = 2, 8, 2

and

C l^{-} = 2, 8, 7

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N a^{+} = 2, 8

and

C l^{-} = 2, 8, 8

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N a^{+} = 2, 8, 2

and

C l^{-} = 2, 8, 6

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N a^{+} = 2, 8

and

C l^{-} = 2, 8, 7

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Solution

The correct option is B $N a^{+} = 2, 8$ and $C l^{-} = 2, 8, 8$
Atomic number of $N a = 11$ and thus atomic no. of $N a^{+}$ $=$ 10 and E.C $= 2, 8$
Atomic number of Cl $=$ 17 and thus atomic no. of $C l^{-}$ $=$ 18 and E.C $=$ 2, 8, 8

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