Explore: Francium

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

Ununennium, also known as eka-francium or element 119, is a hypothetical chemical element; it has symbol Uue and atomic number 119. Ununennium and Uue

Francium (87Fr) has no stable isotopes, thus a standard atomic weight cannot be given. Its most stable isotope is 223Fr with a half-life of 22 minutes

contains 32 elements, tied for the most with period 6, beginning with francium and ending with oganesson, the heaviest element currently discovered. As

lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (Fr). Together with hydrogen they constitute group 1, which lies in the

however, no refinements have been made for francium as no experiment has been conducted. However, francium is expected and, to a small extent, observed

however, no refinements have been made for francium as no experiment has been conducted. However, francium is expected and, to a small extent, observed

physicist and a student of Marie Curie. In 1939, Perey discovered the element francium by purifying samples of lanthanum that contained actinium. In 1962, she

astatine, and francium; all four occur in nature, but only in very minor branches of the uranium and thorium decay chains, and thus all save francium were first

Francium hydroxide is a hypothetical inorganic compound with a chemical formula FrOH. It is a hydroxide of francium. It probably can be produced by reacting