The element with the biggest ionic size is francium due to its large atomic radius and low nuclear charge, leading to a highly polarizable electron cloud and therefore a larger ionic size.
The valence of francium is +1.
Francium is an alkali metal that will lend electrons in an ionic compound.
The molecule is neutral.
Francium and fluorine form an ionic bond. Francium, being a highly reactive metal, will lose its 1 valence electron to fluorine, a highly electronegative non-metal, which will gain the electron to achieve a full valence shell. This transfer of electrons results in the formation of an ionic bond between the two atoms.
The atomic size of francium is of course greater.
Probably Francium Fluoride ( FrF). However, you will NOT find this substance in an open lab. because Francium (Fr) is radio-active. The first ionisation energy of francium is very low. and the 1st electron affinity of fluorine is very high . So they will ionically bond very readily.
Francium would likely form an ionic bond with bromine by transferring its single valence electron to bromine in order to achieve a stable electron configuration. This would result in the formation of francium bromide (FrBr).
This compound is not known today.
Francium and fluoride can form an ionic compound called francium fluoride. Francium is a highly reactive alkali metal, while fluoride is a negatively charged ion. When combined, francium will donate its electron to fluoride, forming a stable compound with a 1:1 ratio of francium to fluoride ions.
The compound FrBr is known as francium bromide. It consists of the alkali metal francium and bromine, forming an ionic bond. Due to francium's extreme radioactivity and rarity, the compound is not commonly encountered in practice.
Yes, the atomic size of francium is greater than that of cesium. Francium is located below cesium in the same group on the periodic table, so as you move down the group, atomic size generally increases.