Metallic Conduction
Definition and meaning of Metallic Conduction in chemistry.
Metallic conduction is the efficient movement of electrical charge through a metallic material due to the flow of free, delocalized electrons.
In more detail
In metallic solid structures, valence electrons detach from individual parent atoms and form a highly mobile "sea of electrons" that move freely throughout the organized crystal lattice. When a voltage potential is applied across the metal, these delocalized electrons drift towards the positive terminal, creating a continuous electric current. Unlike electrolytic conduction found in solutions, metallic conduction does not involve the physical movement of heavy ions or cause any chemical degradation in the material. Furthermore, its conductive efficiency typically decreases as temperature increases because enhanced atomic vibrations increasingly scatter the flowing electrons.
Key facts
| Field | Physical Chemistry |
|---|---|
| Charge Carriers | Delocalized electrons |
| Temperature Dependence | Electrical conductivity decreases as temperature rises |
A standard copper wire exhibits excellent metallic conduction, which is exactly why it is the primary material used in household electrical wiring to transport electricity without chemical alteration.
Frequently asked questions
Why does metallic conductivity decrease with added heat?
Heating a metal causes its stationary atoms to vibrate more vigorously, which increases the scattering of the flowing electrons and effectively raises electrical resistance.
Do metals undergo chemical changes during this conduction?
No, metallic conduction is a purely physical transport process that leaves the metal chemically unchanged.