what is the most likely reason that nonmetals are electrical insulators? This is a topic that many people are looking for. bluevelvetrestaurant.com is a channel providing useful information about learning, life, digital marketing and online courses …. it will help you have an overview and solid multi-faceted knowledge . Today, bluevelvetrestaurant.com would like to introduce to you Why do Metals conduct electricity?. Following along are instructions in the video below:
Video is going to look at why conductors such as metals conduct electricity. And why why insulators such as plastic glass lumps of cheese do not conduct electricity. If you seen the video called the atom that i made youll be able to recognize this and the important parts from this are the middle thats called the nucleus and the nucleus.
Contains. Protons and neutrons and these that fly around the outside called electrons and the electrons follow the path of these black circles around the outside and these are called shells or orbitals now these this basic of this atom is really important for the next step. So its really important you understand this structure before we move on to metals have a look at these two pictures on the left hand side.
Youve got your protons neutrons and electrons. And this is your atom on the right hand side you may notice at the top. Its missing.
An electron therefore. Its not an atom anymore. This is called an ion.
So an atom with more or less electrons is called an ion now this one because its lost a negative electron will be positively charged and again. Its important you notice the difference between these two because were just about to talk to them in metallic bonding in the next slide. Here is the structure of metal and its made up of these red dots that you can see on this picture and theyre your free electrons and they come from the outer shells of the metal atoms and we call those a sea of free electrons now we call them a sea because they act just like a liquid and they can flow about and we call them free electrons because theyre free to move and they can move about within the metal now if those outer electron and outer electrons have been taken away from the atom.
Then whats left are these gray circles. Which are the metal ions and because then electrons are negative. These are going to be positively charged metal ions so just to recap your metal or all metals are made up of a sea of free electrons and whats left behind are your positively charged metal ions.
If youre really good you can call these free electrons by their more technical name. And that is a sea of delocalized electrons now delocalized means that theyve detached themselves from the original atom and they are moved about and are shared by other atoms. But free electrons is good enough.
But delocalized is their more technical term. So coming back to our original question. Why do metals conduct.
So metals like copper on the left of this picture has a sea of free delocalized electrons that can move about and plastics insulators like plastics on the right do not have this sea of delocalized electrons. So therefore they dont conduct electricity. The last thing to note is that even though metals do have this sea of electrons.
It doesnt mean that theyre moving now in this electricity topic. We will see exactly how we can make them move. .
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