Inert Gas 2
 Airco 2 Stage Welding Inert Gas Regulator Gauge US $99.99 
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In what respect does an atom of magnesium, Mg, differ from a magnesium ion, Mg^+2?
The answer is the ion has an inert gas electron configuration, the atome does not
Could you be able to explain this to me?
Well the Mg2+ ion has two less electrons then an Mg atom. It then has eight valence electrons(the same configuration as Neon). Mg has two electrons in its 3s orbital and then typically loses them to some more electronegative element like one O or two Cl atoms. Hope that is helpful.
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