1. The problem statement, all variables and given/known data The title 2. Relevant equations Nah 3. The attempt at a solution It has no free moving ions or electrons Then, my teacher saw the electrons and gave 0 marks to the question(It was on the test paper) He said that if he didn't see electrons there, he would have given a mark. Why? I don't understand. If it does not have free moving ions but have free moving electrons, then it will conduct. My answer should not be wrong!