Question

plzz help me in this question

the atoms of copper contain electrons and the atoms of rubber also contain electrons?then why does copper conduct electricity but rubber does not conduct electricity??

Answer 1

Note: Any substance will be a conductor when it will have free electrons with witch it conducts electricity and heat. 

It is true that copper and rubber, both have electrons but copper has free electrons, which are responsible for flow of current and hence, conduct electricity but Rubber, on the other hand, does not have free electrons and cannot conduct electricity and are called insulators.

That's the reason why rubber doesn't conducts electricity..

Hope this will help u... :-)