5. Gain and Loss of Electrons   Previous PageNext Page
       Ions and Salts

Metals conduct electricity because the outer electrons of their atoms are mobile.

If a piece of metal is connected to the terminals of a battery, electrons will flow into one end of the metal block, through the metal, out the other end, and back to the battery.

Only the electrons move; the metal ions remain in place.


In the diagram above, click on the switch to turn the circuit on and off, and click on the Metal for a closer view.

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