What is the meaning of atomic number 69?

noun

  • A soft silvery metallic element of the rare earth group; isotope 170 emits X-rays and is used in small portable X-ray machines; it occurs in monazite and apatite and xenotime.
WordNet 3.0 © 2006 by Princeton University
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APAWordNet. (2010). atomic number 69. Retrieved September 21, 2026, from http://smartdefine.org/atomic_number_69/definitions/1258346
ChicagoWordNet. 2010. "atomic number 69" http://smartdefine.org/atomic_number_69/definitions/1258346 (accessed September 21, 2026).
HarvardWordNet 2010, atomic number 69, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/atomic_number_69/definitions/1258346>.
MLAWordNet. "atomic number 69" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/atomic_number_69/definitions/1258346>