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 is named after France. A vertical column in the periodic table. Members of a group typically have similar properties and electron configurations in their outer shell. A horizontal …

2016年12月22日 · Counting down from hydrogen, which is in the #n=1# shell, francium's outermost electrons are "contained" within the #n=7# shell and the element resides in the "#s# …

2018年8月2日 · Francium atoms have 87 electrons and the shell structure is 2.8.18.32.18.8.1. The ground state electron configuration of ground state gaseous neutral francium is [Rn].7s 1 …

Francium is a highly radioactive metal that decays into astatine, radium, and radon. Figure: Shell diagram of Francium (Fr) atom. Francium was discovered by Marguerite Perey in France (from …

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 …

2024年9月1日 · How many shells does francium have? It’s 7. Right? You have already seen the bohr model of francium atom in the above table. From the Bohr model, it can be found that the …

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 …

Francium can be produced by bombarding thorium with protons or by bombarding radium with neutrons. Francium's most stable isotope, francium-223, has a half-life of about 22 minutes. It …

2023年5月27日 · Francium element is an alkali metal having an atomic number (Z) 87, belonging to the s-block element. Francium has the same number of valence electrons as lithium, thus …