Iron Metal is a solid structure, it conducts electricity and
heat. The electrons in it allow electricity to pass through it, it
is an electrolyte.
Iron Oxide is a gas, it doesn't conduct electricity therefore
does not let electricity pass through it. it is not an
Anything that ionizes is ideal as an electrolyte, the more
easily it ionizes in an aqueous, the better an electrolyte it is.
For example sodium ions, Na+(aq), are better electrolytes than Iron
metal particles, Fe(s).
A strong electrolyte dissociates completely into ions in
aqueous solution. When iron(II) chloride, a strong
electrolyte, is put into water the cations and anions are
surrounded by water molecules and the solid dissolves.
FeCl2(s) --> Fe2+(aq) + 2Cl-(aq)