Answer:
Chromium, germamium, iodine
Explanation:
Chromium is a metal, germamium is a metalloid, and iodine is a non-metal.
Metals, as you know, have the most conductivity, making chromium more conductive than the other two. Germamium has characteristics of metals, but isn't a conforming metal, therefore making it more conductive than non-metals. Non metal's are not conductive.
