If a material conducts electricity due to delocalized electrons, which property is likely enhanced?

If a material conducts electricity due to delocalized electrons, which property is likely enhanced?

• A. Delocalized electrons can move
• B. Ions must be present
• C. The atoms are ions
• D. It has no bonds

Answer: (A)

The key idea is that metals conduct electricity because the outer electrons are delocalized and free to move. When a voltage is applied, these electrons drift through the lattice, creating an electric current. So the property that’s enhanced is the mobility of those electrons—their ability to move—which is exactly what enables electrical conduction. The material relies on metallic bonding with a “sea” of electrons, not on ions moving or on there being no bonds. That electron mobility directly explains the conductivity.

The key idea is that metals conduct electricity because the outer electrons are delocalized and free to move. When a voltage is applied, these electrons drift through the lattice, creating an electric current. So the property that’s enhanced is the mobility of those electrons—their ability to move—which is exactly what enables electrical conduction. The material relies on metallic bonding with a “sea” of electrons, not on ions moving or on there being no bonds. That electron mobility directly explains the conductivity.