The discovery the electron was made in 1897 by J. J. Thomson at the Cavendich Laboratory at Cambridge University (England), while he was studying cathode ray tubes.
The electron is a fundamental subatomic particle that carries a negative electric charge.
Electrons make up atoms together with protons and neutrons. When the electrons are not part of the structure of atoms are moving freely in vacuum. When free electrons move, there is a net flow of charge, and this flow called electric current
Electrons have an electric charge of -1,602x10-19 coulumb and a mass of 9.11x10-31 Kg.
In everyday live the electrical current in our homes is caused by electrons moving. The cathode ray of a television is based on in a electron beam.
In industry the electron beams are used in solders.
In medicine is used in radiation therapy for treatment of superficial tumours…
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