Francium has the lowest electronegativity and fluorine the highest.
Fluorine is the most active non-metal due to its high electronegativity, which allows it to readily gain an electron to achieve a stable electron configuration. Francium is the most active metal because it has the lowest ionization energy among all the elements, making it highly reactive and prone to losing an electron to form a positive ion.
Francium has the greatest electropositivity and the lowest electronegativity.
Francium
The electronegativity difference between fluorine and francium is approximately 3.9. Fluorine is the most electronegative element on the periodic table, while francium is one of the least electronegative. This significant difference in electronegativity contributes to the reactivity and chemical behavior of these elements.
Francium has the greatest electropositivity and the smallest electronegativity.
The most reactive metal is is francium, though cesium is often given this title due to francium's extreme rarity and short half life. The most reactive element is commonly said to be fluorine. But fluorine is a nonmetal.
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 next is caesium.
Fluorine is sometimes called the hungry wolf of the periodic table because it is the most reactive element.
It is fluorine. Fluorine is part of the halogens they are very active nonmetals.
Fr or Francium is the most reactive alkali metal (group 1)
Fr (Francium) has a larger atomic radius than F (Fluorine) because atomic radius increases as you move down a group in the periodic table. Francium is located at the bottom of the alkali metal group while Fluorine is at the top of the halogen group.