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Definition of Atomic number 90
1. 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.
Exact synonyms: Th, Thorium
Generic synonyms: Metal, Metallic Element
Specialized synonyms: Radiothorium, Thorium-228
Substance meronyms: Monazite, Thorite
Derivative terms: Thoriate
Generic synonyms: Metal, Metallic Element
Specialized synonyms: Radiothorium, Thorium-228
Substance meronyms: Monazite, Thorite
Derivative terms: Thoriate
Lexicographical Neighbors of Atomic Number 90
Literary usage of Atomic number 90
Below you will find example usage of this term as found in modern and/or classical literature:
1. The Origin of Spectra by Paul Darwin Foote, Fred Loomis Mohler (1922)
"The incident x-rays also excite characteristic fluorescent radiation in 40 35 30
25 20 10 15 3O 60 75 atomic number 90 FIG. 33. ..."
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