Write the electronic configurations of the following ions:

B. $N a^{+}$

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Solution

(b) $N a^{+}$ ion
The electronic configuration of Na atom is $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}$
A positive charge on the species indicates the loss of an electron by it. The electron is lost from the outermost orbit.
Therefore, electronic configuration of $N a^{+} = 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{0} o r 1 s^{2} 2 s^{2} 2 p^{6}$

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