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Why is calcium a poor conductor of electricity than aluminium?

It is easier for the "sea of electrons" in Al to move. But Ca still is a conductor.

Did you know?

Did you know that calcium is a poor conductor of electricity compared to aluminium? This is because calcium is a metal with a lower electrical conductivity, while aluminium is an excellent conductor. The difference arises from the number of valence electrons (outer shell electrons) in their atomic structure. Calcium has only two valence electrons, which are tightly held by the nucleus, making it difficult for them to move freely when an electric charge is applied. On the other hand, aluminium possesses three valence electrons that are relatively loosely bound, allowing them to move more easily and conduct electricity efficiently. So, next time you wonder about conductivity, remember that the number of valence electrons plays a significant role in determining whether a material is a good or poor conductor of electricity.