What is the electronic configuration of sodium ion?

1 Answer
anor277
Sep 6, 2017

Look at your Periodic Table.....

Explanation:

For sodium, #Z=11#, i.e. #1s^(2)2s^(2)2p^(6)3s^(1)#.

If the metal is IONIZED, we gets.....#1s^(2)2s^(2)2p^(6)#, and this is a NEON core, which we could represent as #{1s^(2)2s^(2)2p^(6)}^+#, or #[Ne]^+#. And thus the ion has the electronic configuration of the LAST Noble Gas, i.e. neon....many metal ions share this configuration.....#Mg^(2+)#, #Al^(3+)#....

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