The structure of an electron, according to our current understanding in physics, is described by the theory of quantum mechanics. Electrons are fundamental particles, meaning they are not composed of smaller particles. In quantum mechanics, electrons are considered to be point-like particles with no internal structure, meaning they do not have a size or substructure like tiny dots.
However, it is important to note that electrons do exhibit wave-particle duality. This means that they can exhibit both particle-like and wave-like behavior, depending on the experimental setup. When we talk about electrons as particles, we usually refer to their discrete properties, such as their charge and mass. On the other hand, when we talk about electrons as waves, we refer to their wave-like nature and describe their behavior using wave functions.
The wave-like behavior of electrons is often observed in experiments such as the double-slit experiment, where electrons can exhibit interference patterns similar to waves. This phenomenon led to the development of the mathematical framework of quantum mechanics, which successfully describes the behavior of electrons and other particles at the microscopic level.
In summary, electrons are considered to be point-like particles without internal structure, but they can also exhibit wave-like behavior under certain conditions. The understanding of electrons as both particles and waves is a fundamental aspect of quantum mechanics.