you have heard that electrons are tiny particles of electricity, but you may not have a very clear idea of the part electrons play in making up all the materials around us. you can find out about the electron by carefully examining the composition of any ordinary materials:-say a drop of water.

If you take this drop of water and divide it into two drops, divide one of these two drops into two smaller drops and repeat this process a few thousand times, you will have a very tiny drop of water. this tiny drop will be so small that you will need the best microscope made today in order to see it 

This tiny drop of water will still have all the chemical characteristics of water.it can be examined by a chemist, and he will not able to find out any chemical difference between this microscopic drop and an ordinary glass of water.  

Now you take this tiny drop of water and try to divide it in half any further, you'll not be able to see it in your microscope. imagine having a super microscope that will magnify many times as much as any microscope presently existing. 

This microscope can give you any magnification you want, so you can put your tiny drop of water under it and proceed to divide it into smaller and smaller droplets. 

As the droplets of water are divided into smaller and smaller droplets these tiny droplets will still have all the chemical characteristics of water. However, eventually will have a  droplet so small that any further division will cause it to lose the chemical characteristics of water.

This last bit of water is called a "molecule" under high magnification, you'll see it is composed of three parts closely bonded together.

THE break down of the atom:-

Now that you know that'll materials are made by molecules which consist of various combinations of about only 100 different types of atom, you will want to know all this has to do with electricity.

Increase the magnification of your imaginary super microscope still further examine one of the atoms you find in the water molecule. pick out the smallest atom you can see the hydrogen atom and examine it closely.

You see that hydrogen atom is like a sun with one planet spinning around it. the planet is known as an electron and the sun is known as the nucleus has a positive charge of electricity.