Definisjon av francium

Vi fant 4 definisjoner av francium på engelsk.

WordNet

Noun
francium - a radioactive element of the alkali-metal group discovered as a disintegration product of actinium
		Fr, atomic number 87

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Substantiv
francium - A metallic chemical element symbol Fr with an atomic number of 87.

Francium is a chemical element that has the symbol Fr and atomic number 87. It has one of the lowest electronegativities of all known elements, and is the second rarest naturally occurring element. Francium is a highly radioactive metal that decays into astatine, radium, and radon.

francium
Chemical element with symbol Fr and atomic number 87, alkali metal.

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