francium
Pronunciation Noun
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Pronunciation Noun
francium (uncountable)
- The chemical element (symbol Fr) with an atomic number of 87. It is an intensely radioactive alkali metal that is not found in nature.
- 2003, Bill Bryson, A Short History of Nearly Everything, BCA, p. 221:
- The most elusive element of all, however, appears to be francium, which is so rare that it is thought that our entire planet may contain, at any given moment, fewer than twenty francium atoms.
- 2003, Bill Bryson, A Short History of Nearly Everything, BCA, p. 221:
- (countable) A single atom of this element.
- 1999, Peter J. Krieger, Understanding Chemical Principles: A Learning Companion (page 56)
- Notice that franciums are balanced without even thinking in moles, atoms, or whatever.
- 2007, Carl J. Gross, Witold Nazarewicz, Krzysztof P. Rykaczewski, The 4th International Conference on Exotic Nuclei and Atomic Masses (page 180)
- (a) Radons and poloniums are compared, (b) poloniums and astatines are compared and (c) radons and franciums are compared.
- 1999, Peter J. Krieger, Understanding Chemical Principles: A Learning Companion (page 56)
- actinium-K (obsolete)
- virginium (obsolete)
- French: francium
- German: Francium
- Italian: francio
- Portuguese: frâncio
- Russian: фра́нций
- Spanish: francio
This text is extracted from the Wiktionary and it is available under the CC BY-SA 3.0 license | Terms and conditions | Privacy policy 0.003