What is the meaning of atomic number 63?

noun

  • A bivalent and trivalent metallic element of the rare earth group.
WordNet 3.0 © 2006 by Princeton University
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APAWordNet. (2010). atomic number 63. Retrieved September 20, 2026, from http://smartdefine.org/atomic_number_63/definitions/1258341
ChicagoWordNet. 2010. "atomic number 63" http://smartdefine.org/atomic_number_63/definitions/1258341 (accessed September 20, 2026).
HarvardWordNet 2010, atomic number 63, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/atomic_number_63/definitions/1258341>.
MLAWordNet. "atomic number 63" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/atomic_number_63/definitions/1258341>