Question

which lists the elements in order from most conductive to least conductive?
potassium (k), selenium (se), germanium (ge)
germanium (ge), potassium (k), selenium (se)
selenium (se), germanium (ge), potassium (k)
potassium (k), germanium (ge), selenium (se)

Explanation:

Potassium (K) is a metal, which has good electrical conductivity. Germanium (Ge) is a metalloid, with conductivity less than metals but more than non - metals. Selenium (Se) is a non - metal, and non - metals generally have poor electrical conductivity.

Answer:

potassium (K), germanium (Ge), selenium (Se)