Also known as: fr.
FR has various meanings in the Chemistry category. Discover the full forms, definitions, and usage contexts of FR in Chemistry.
Symbol:"Fr" Atomic Number:"87" Atomic Mass: (223)amu. One of the alkali metal family. Francium is the heaviest of the alkali metals and is extremely rare in nature. It can be created in a lab and acts like cesium.
ChemistryA molecule with an unpaired electron. Because they have a free electron, such molecules are highly reactive.
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