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atomic number 90 meaning and definition

Definition and meaning of atomic number 90 at MeaningMonkey.org. atomic number 90 meaning and definition in the English Dictionary.

ATOMIC NUMBER 90 noun

Definition of atomic number 90 (noun)

  1. 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
Source: Princeton University Wordnet
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