Lithium, sodium, potassium, rubidium, caesium and francium are alkali metals.
Source: tatoeba (1555667)
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Lithium, sodium, potassium, rubidium, caesium and francium are alkali metals.
Source: tatoeba (1555667)
At any given moment, there are perhaps eight francium atoms in the whole of the earth.
Source: tatoeba (2136324)
Francium is a chemical element of the symbol Fr.
Source: tatoeba (2754901)
The atomic number for francium is 87.
Source: tatoeba (12490135)
Showing 4 of 7 available sentences.
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.