Why are ?electrons?, rather than ?protons?, the principal charge carriers in metal wires?
Solution 3RQ Step 1 of 2: In case of metals, the atom has the proton at the center of nucleus inside the nuclei of atom. Whereas one or more electrons from each metal atom are free to move through the atomic lattice and are know as free electrons. In case of metals, there are large number of such free electrons than protons. Which constitutes as principal charge carriers in case of metals.