Wave functions of the electron in a hydrogen atom at different energy levels. Quantum mechanics cannot predict the exact location of a particle in space, only the probability of finding it at different locations.1 The brighter areas represent a higher probability of finding the electron.
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Footnotes
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Born, M. (1926). “Zur Quantenmechanik der Stoßvorgänge” [On the Quantum Mechanics of Collision Processes]. Zeitschrift für Physik (in German). 37 (12): 863–867. Bibcode:1926ZPhy…37..863B. doi:10.1007/BF01397477. ISSN 1434-6001. S2CID 119896026. ↩