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RHYS LEWIS, AHS, DECD, UNISA / ANIMATE4.COM / SCIENCE PHOTO LIBRARY RHYS LEWIS, AHS, DECD, UNISA / ANIMATE4.COM / SCIENCE PHOTO LIBRARY
Lithium electronic structure. Animation of the electronic structure of the element lithium. An atom of this element has 3 electrons, shown here as black dots in shells around the nucleus (centre). The electrons are in two shells. The animation zooms in to show the two electrons in the first shell (both in the 1s orbital). There is a single electron in the second shell (the 2s orbital). The electron configuration is 2,1. The isotope shown here is lithium-7, with a nucleus of 3 protons (red) and 4 neutrons (blue). All isotopes of an element have the same electronic structure.
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