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Answer 1 · 2014-01-23T03:29:37

The standard electron configuration for magnesium would be #1s^2 2s^2 2p^6 3s^2#

The noble gas one row above magnesium is neon. Neon would have an electron configuration of #1s^2 2s^2 2p^6#.

Therefore, #1s^2 2s^2 2p^6# can be replaced by the noble gas [Ne].
This makes the noble gas configuration of magnesium
[Ne] #3s^2#

I hope this is helpful.
SMARTERTEACHER

Check out this You Tube video.

Answer 2 · 2015-03-15T00:19:04

The following video discusses how to find the noble gas electron configuration for magnesium.