francium
IPA: frɑnsiʌm
noun
- The chemical element (symbol Fr) with an atomic number of 87. It is an intensely radioactive alkali metal that is not found in nature.
- (countable) A single atom of this element.
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Examples of "francium" in Sentences
- For example, take a look at Francium.
- And so on, all the way down to Francium.
- Cesium and francium do not have a valence of 3.
- The francium is then injected into a glass bulb.
- He's linked to the article on Francium, an element.
- Cropped image of device used to trap Francium atoms.
- But francium may not necessarily be more electropositive.
- All isotopes of francium decay into either astatine, radium, or radon.