Francium - Wikipedia 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 actinium K after the natural decay chain in which it appears), has a half-life of only 22 minutes
Francium | Radioactive, Alkali Metal, Rare | Britannica francium (Fr), heaviest chemical element of Group 1 (Ia) in the periodic table, the alkali metal group It exists only in short-lived radioactive forms Natural francium cannot be isolated in visible, weighable amounts, for only 24 5 grams (0 86 ounce) occur at any time in the entire crust of Earth
Francium: Facts about the elusive radioactive element Francium — the 87th element on the periodic table — is a naturally occurring, but incredibly rare, radioactive element It forms and decays extremely quickly, so it has no practical uses, and it
Francium (Fr) – Definition, Preparation, Properties, Uses . . . - Examples Francium is a chemical element with significant scientific intrigue, primarily due to its rarity and position in the periodic table As the heaviest known alkali metal, Francium exhibits unique properties that captivate chemists and educators
Francium Facts (Atomic Number 87 or Fr) - ThoughtCo Francium is a rare and highly unstable element with the atomic number 87 and symbol Fr Discovered in 1939, francium decays quickly, making it the second rarest natural element after astatine Due to its rarity and instability, francium is mainly used for research, including spectroscopic experiments
Francium Element Facts - chemicool. com Francium is a heavy, unstable, radioactive metal with a maximum half-life of only 22 minutes It has a low melting point (27 o C, 81 o F) and, if enough of it could be accumulated, it would be liquid in a warm room Francium is the second rarest element in the Earth’s crust, next to astatine
Periodic Table of Elements: Los Alamos National Laboratory Francium, the heaviest known member of the alkali metals series, occurs as a result of an alpha disintegration of actinium It can also be made artificially by bombarding thorium with protons While it occurs naturally in uranium minerals, there is probably less than an ounce of francium at any time in the total crust of the earth