Which of the following ions is not having the configuration of neon

1.	Which of the following ions is not having the configuration of neon
Answer» `F^-` `Mg^(+2)` `Na^+` `CL^-` SOLUTION :CONFIGURATION of NE=`1s^2 2s^2 2p^6` `F^(-) =1s^2 2s^2 2p^6` `Na^(+)=1s^2 2s^2 2p^6` `Mg^(++)=1s^2 2s^2 2p^6` `Cl^(-)=1s^2 2s^2 2p^6 3s^2 3p^6`

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