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Source: U.S. Nuclear Regulatory Commission | Source: U.S. Nuclear Regulatory Commission | ||
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Revision as of 18:02, 27 May 2019
The smallest particle of an element that cannot be divided or broken up by chemical means. It consists of a central core of protons and neutrons, called the nucleus. Electrons revolve in orbits in the region surrounding the nucleus.
Source: U.S. Nuclear Regulatory Commission