The electron has mass because it is a fundamental particle, meaning it is one of the building blocks of matter. According to the Standard Model of particle physics, all fundamental particles have mass.
The electron gains mass through its interactions with the Higgs field. This field permeates all of space and gives particles their mass. The more a particle interacts with the Higgs field, the more mass it has.
Yes, the mass of an electron can change through interactions with other particles or fields. For example, when an electron is moving at high speeds, it gains energy and therefore its mass increases. However, the change in mass is very small and difficult to measure.
The mass of an electron plays a crucial role in its behavior. It determines how quickly an electron can move and how it interacts with other particles and fields. For example, a heavier electron will move more slowly than a lighter one and will interact differently with the Higgs field.
The mass of an electron is important because it is a fundamental property of matter. It allows us to understand and describe the behavior of electrons and their interactions with other particles. Additionally, the mass of an electron is directly related to the stability of atoms and the formation of chemical bonds, making it essential for the existence of our universe.