Why does electrical conductivity increase across the periodic table from sodium to magnesium to aluminium?

Is it something to do with the electrons?

It would not be equivalent and you can do thick aluminum with tig no problemBut if you took the test in tig, it would only certify you in the tig processIf the employer uses mig, then you must test with itIt isn't too hard to mig aluminum, just practice a little while.

metallic character order - NaMgAl So this means Na is more electron hungry than Mg , and Mg than Al so electrons are more free to conduct electricity as we move from na to mg to al;