The existence of electrons and other elementary particles is not merely theoretical but has been extensively confirmed through scientific experiments and observations. The existence and properties of these particles have been established through a combination of theoretical models, experimental evidence, and technological advancements.
The field of particle physics, also known as high-energy physics, investigates the fundamental particles and their interactions. Over the years, numerous experiments conducted in particle accelerators, such as the Large Hadron Collider (LHC), have provided strong evidence for the existence of electrons and other elementary particles.
Electrons, for example, were first postulated by J.J. Thomson in the late 19th century and were later experimentally observed in cathode ray tubes. Since then, their behavior and properties have been extensively studied and confirmed through a variety of experiments, including those involving the behavior of electrons in electric and magnetic fields.
Similarly, other elementary particles such as quarks, neutrinos, muons, and many others have also been experimentally observed and studied in great detail. The Standard Model of particle physics, which is a well-established theoretical framework, describes the properties and interactions of these elementary particles.
It's important to note that our understanding of elementary particles continues to evolve, and ongoing research aims to deepen our knowledge and explore new frontiers of particle physics. However, the existence of electrons and other elementary particles is firmly grounded in experimental evidence and forms the basis of our current understanding of the subatomic world.