In a substance, When we reach into a microscopic state, There is a region named sub-atomic region. Here are particles found in three different states. There are some particles which are negatively charged. These negatively charged particles are called as Electrons. These revolve around some central particles due to some centripetal forces which present in them. These are also called building blocks of any substance in the universe. An electron has a charge of about -1.60217662 * 10^-19 coulombs since the charge of the subatomic particles are measured in coulombs.
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