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 …

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 …

Francium definition, discovery, properties (atomic mass, color, melting point, atomic number, electron configuration), reactivity in water, common uses

Francium, number 87, was the last of these elements to be discovered in nature. From its position in the table, it was clear that element 87 would be a reactive alkali metal, the heaviest member …

Jul 26, 2022 · 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 …

Jun 9, 2025 · 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 …

Francium is formed by radioactive decay of actinium, and artificially made by bombarding thorium with protons. It is naturally present in uranium and consider the second rarest element in the …

Jan 21, 2025 · 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 …

Francium is a highly radioactive element with the atomic number 87, belonging to the alkali metal group in the periodic table. Its general importance is more academic and research-based than …

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. …