What is the meaning of atomic number 90?

noun

  • A soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear reactors; occurs in thorite and in monazite sands.
WordNet 3.0 © 2006 by Princeton University
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APAWordNet. (2010). atomic number 90. Retrieved September 21, 2026, from http://smartdefine.org/atomic_number_90/definitions/1258369
ChicagoWordNet. 2010. "atomic number 90" http://smartdefine.org/atomic_number_90/definitions/1258369 (accessed September 21, 2026).
HarvardWordNet 2010, atomic number 90, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/atomic_number_90/definitions/1258369>.
MLAWordNet. "atomic number 90" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/atomic_number_90/definitions/1258369>