Fatima

          T he largest Category of course other metals Semi metals understand how the electrons behave in those substances and determine their conductivity n ow there's a range of substances . In the metals category and some are more conductive than others gold is a better conductor than iron for example And of course in our nonmetals, we clearly have substances that are very good insulators. They don't conduct any electricity at all . In this video. I want to talk specifically  about  what the factor is that determines their conductivity and I'm going to introduce the concept of the band theory and hopefully, in this video you come away with a better understanding of What it is that is occurring at the molecular level? as you know the atom consists of a nucleus with electrons that are in orbit around it and These orbits are in discrete shells So let's take atoms such as sodium. We know it's sodium that as long as it's neutral i...