Question

What is the electronic configuration of sodium ion?

Answer 1

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+)`....