Question

How would `Mg` change to gain a noble gas structure?

Answer 1

You tell us....you gots `Mg`, `Z=12`....

Explanation:

...whose electronic configuration is `underbrace(1s^(2)2s^(2)2p^(6))_"neon confiugration"3s^(2)`

..and if the metal is oxidized to give what cation would a Noble Gas configuration be achieved?