noun
francium
FRAN-see-um
Francium (noun) means a highly radioactive alkali metal, symbol Fr, with atomic number 87, that is not found in nature. Example: “Francium is an alkali metal.”
noun
1
chemistry A highly radioactive alkali metal, symbol Fr, with atomic number 87, that is not found in nature.
"Francium is an alkali metal."
"Francium has the atomic number 87."
"Francium is intensely radioactive."
2
chemistry A single atom of the element francium.
"The experiment trapped a single francium."
"Each francium atom in the sample was radioactive."
How to use francium
Learner’s notesIn plain EnglishA rare, intensely radioactive metallic element with the symbol Fr.
When to use it
It is a technical term used in chemistry and physics.
Common pairings
francium atom
radioactive francium
Vocabulary Flow
Build your vocabulary from words like francium.
Vocabulary Flow serves the next word, and the next — meaning, pronunciation and an example each time. Practice at your level, or learn English in your own language.
Start vocabulary practice
Fill the gap
Can you complete this real example?
_____ is an alkali metal.
Etymology
The word came into English from French, where it was formed from France plus the ending -ium. It was named after the native country of Marguerite Perey.
Rhymes for francium
See all rhymes for francium →Frequently asked questions
What is francium?
Francium is a chemical element with the symbol Fr and atomic number 87. It is an intensely radioactive alkali metal.
Is francium found in nature?
No, francium is not found in nature.
Where does the name francium come from?
It comes from French, formed from France and the ending -ium, after the native country of Marguerite Perey.
What is the meaning of francium?
"francium" (noun) means a highly radioactive alkali metal, symbol Fr, with atomic number 87, that is not found in nature.
