Element Francium (Fr), Group 1, Atomic Number 87, s-block, Mass [223]. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.

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 is heaviest known metal of alkali group. Its atomic number is 87 and atomic mass is 223 [2]. Francium chemical properties are similar with caesium. It has slightly higher ionization energy and electron affinity than caesium. It is the least electronegative element so it is chemically reactive alkali metal.

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

Periodic Table element Summary Francium Francium is a chemical element with symbol Fr and atomic number 87. Classified as a n alkali metal, Francium is a solid at room temperature.

Francium is a chemical element of the periodic table with chemical symbol Fr and atomic number 87 with an atomic weight of 223 u and is classed as alkali metal and is part of group 1 (alkali metal). Francium is solid at room temperature.

Francium is the 87th element in the periodic table and has a symbol of Fr and atomic number of 87. It has an atomic weight of (223) and a mass number of 197. Francium has eighty-seven protons and one hundred ten neutrons in its nucleus, and eighty-seven electrons in seven shells.

Francium occurs as a result of α disintegration of actinium. Francium is found in uranium minerals, and can be made artificially by bombarding thorium with protons. It is the most unstable of the first 101 elements. The longest lived isotope, 223 Fr, a daughter of 227 Ac, has a …

Get the facts about element Francium (Fr) [87] from the periodic table. Find physical data, electron configuration, chemical properties, aggregation states, isotope data (including decay trees) as well as some historic information.

2023年10月9日 · Francium is a chemical element with the atomic number 87 and it is represented by the symbol ‘Fr’ in the periodic table. It belongs to Group 1 and Period 7 of the periodic chart. It is classified as an alkali metal. It is a soft, low-melting, silvery-white metal.