What is the meant by electrons ?

An electron is a negatively charged component of an atom. Electrons exist outside of and surrounding the atom nucleus. The charge of an electron is 1.602 x 10-19 coulomb. Its mass is less compared to that of a neutron or proton. The mass of an electron is 9.10938 x 10-31 kg, which is about 1/1836 the mass of a proton. In quantum mechanics, electrons are considered identical because there is no intrinsic physical property that can distinguish between them. Therefore, Electrons may swap positions with each other without causing an observable change in a system. The charge of a substance is determined by a balance between the number of electrons and the positive charge of the nuclei. If there are more electrons, then the charge of the substance will be negative, else positive. If both are equal then, the charge of substance will be neutral. Electrons can also exist free in a vacuum. They are called free electrons. Electrons in a metal behave as if they were free electrons and can move to produce a net flow of charge termed an electric current. When electrons move, a magnetic field is generated.


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Updated on: 10-Oct-2022


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