LAGUNA DESIGN / SCIENCE PHOTO LIBRARY LAGUNA DESIGN / SCIENCE PHOTO LIBRARY
Hydrogen atom. Computer artwork of an atom of the element hydrogen. The atom is shown as a nucleus (a proton, pink), and an electron orbiting in a wavy path (light blue). The blue sphere represents the basic spherical orbital of the hydrogen atom, called the 1s orbital. This orbital defines the distance from the nucleus where the electron is most likely to be found. Hydrogen is the simplest and most abundant element in the universe.
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