Why are metals generally good conductors of electricity?
They have relatively high density
They have many free electrons✓الإجابة الصحيحة
They have many free protons
They have relatively high Young’s modulus values
الشرح
In metals the outer valence electrons are not held to individual atoms and can drift through the material, so even a small applied voltage produces current. Density and mechanical stiffness say nothing about how easily charge moves.