The electron is the lightest stable subatomic particle that carries a negative charge, the basis of electricity. This new high/low book explains the inner workings of the electron as well as its discovery in 1897 by British physicist J. J. Thomson, and how that discovery led to the eventual model of the structure of the atom.
An electron is a subatomic particle with a negative charge. To find out the total number of electrons of an element, you add the number of protons and neutrons the element contains. The electron was discovered by J.J. Thompson in 1897.