Francium is a chemical element; it has symbol Fr and atomic number 87. It is extremely radioactive; its most stable isotope, francium-223 (originally called ...

An intensely radioactive metal. Uses: Francium has no uses, having a half life of only 22 minutes. Biological role: Francium has no known biological role.

26 июл. 2022 г. · Francium — the 87th element on the periodic table — is a naturally occurring, but incredibly rare, radioactive element.

Chemical element, Francium, information from authoritative sources. Look up properties, history, uses, and more.

15 окт. 2024 г. · What had previously been known simply as “element 87” was subsequently renamed "francium" in honor of Perey's home country, which also lends its ...

Francium is an element with the chemical symbol Fr and atomic number 87 in the periodic table. It is produced both naturally and by artificial methods. Most ...

As it turns out, francium was one of the last natural elements to be discovered, and is the second rarest after astatine. Estimates of the abundance of francium ...

The chemical element francium is classed as an alkali metal. It was discovered in 1939 by Marguerite Perey. Data Zone. Classification: Francium is an alkali ...

Francium is classified as a chemical element that has an atomic number of 87 and belongs to Group 1A on the periodic table. Francium's neighbors in this group ...