The two natural isotopes of francium - 223Fr and 221Fr - are extremely rare (only ca. 30 g in the earth crust).
The hardness of francium cannot be measured.
because it only has a half life of 22 minutes so by the time any one could get to it the francium had died
francium is commonly found as hard rock unless it comes from gravestones
Francium chloride is a radioactive chemical compound with the formula FrCl. It is predicted to be a white solid and is soluble in water. Its properties resemble caesium chloride. It is produced by the reaction of hydrochloric acid with francium metal. Source: Wikipedia
Because the atom of francium is a whole row down from cesium. You see more YouTube videos of cesium in water because francium is highly radioactive, so it would be very hard to obtain a sample of francium to throw into water.
The chemistry of francium is practically unknown.
As francium is a chemical element, it is made up of protons, neutrons and electrons.
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Francium is not reactive as it is a very weak and small substance of an atom in the element. Francium is used useless things, so therefore it is not reactive.
The word that means hard to detect or describe is elusive.
Francium is a highly reactive alkali metal that is considered one of the most unstable elements. It is incredibly rare and difficult to obtain due to its radioactivity and short half-life of about 22 minutes.
Francium is not a solvent, so it cannot be classified as polar or nonpolar in the context of solvents. Francium is a highly reactive metal element that is not commonly used as a solvent in chemical processes.