X
Well attestedNamed from the place

francium

noun · first attested 1939

Its discoverer first wanted to call it catium, and was told it would sound like cat in English.

The alkali metal element 87, the second rarest naturally occurring element, whose longest-lived isotope has a half-life of 22 minutes.

France·France

47.0000°N 2.0000°E · Q142

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Named from the place
Confidence
Well attestedThe place link is the standard scholarly account.
Attested
1939
Part of speech
noun

Explanations here are written for this atlas. Dictionary text is not copied; the sources are linked so the claim can be checked.

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    France

  2. In English

    francium

The entry

Marguerite Perey identified element 87 at the Curie Institute in Paris in 1939, in the decay of actinium-227. She proposed catium for its strongly electropositive character, then named it for her country instead. IUPAC adopted francium in 1949. Perey later became the first woman elected to the French Academy of Sciences.

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