User can create, shape and manipulate electrons, subatomic particles with a negative elementary electric charge which are generally thought to be elementary particles because they have no known components or substructure. They have properties of both particles and waves, and so can collide with other particles and can be diffracted like light. Many physical phenomena involve electrons in an essential role, such as electricity, magnetism, and thermal conductivity, and they also participate in electromagnetic and weak interactions. An electron moving relative to an observer generates a magnetic field; external magnetic fields will deflect an electron.