Test 1: Objective 2

An electron is a particle within an atom creating a negative charge. They were officially discovered by Johann Wilhelm Hittorf, who was a German physicist. No one has ever actually seen an atom, much less an electron, since electrons are hundreds or thousands the size of atoms. But we almost never come across a discovery like this by accident. It is human nature to come up with an idea, and then try to support that idea with evidence. With the right equipment, it is very easy to see an electron. We can bounce things, such as neutrons or ELECTRONS!!! off of atoms. We can also track the movement of electrons by studying electricity.