At this point we notice that electrical phenomena start to set in. Usually some electrons leave the substance or the object, while an equal amount of electrons flows to the object from the other end, so the object retains its net zero charge. Movement of charges is very important in technology, further we will call this movement a current . We now reiterate, what we just learned. Electricity has to do with electrons, which are all identical and have the property called electron charge, and is, by definition negative.
Larger bodies can also have charge, either negative or positive.
Negatively charged bodies have an excess of electrons compared to uncharged bodies. These electrons could have been intentionally transferred from another charged body, or in a process of a natural phenomenon, such as the lightning strike, friction etc. Objects can also be positively charged, in which case a number of their electrons are missing. This once again can arise through friction, charge transfer, etc. This is not a very convenient quantity as a single electron charge is very small.