Fluorine
The most chemically active element is the halogen known as fluorine. Be
Fluorine is the most active member of the halogen family because it has the highest electronegativity and is highly reactive, readily forming compounds with other elements.
The alkali group of metals is the most active.
Fluorine, F, is the most reactive element of all.
This halogen is astatine.
Helium, the noble gas with the smallest atoms.
Fluorine is the most chemically active halogen due to its small atomic size and high electronegativity, which allows it to readily react with a wide variety of other elements.
A metal and halogen react to form an ionic bond in which the metal gives an eletron to the halogen Most basic example would be table salt NaCl NaOH + HCl = NaCl + H20
The most abundant halogen on Earth is chlorine. It is commonly found in seawater, salt deposits, and as part of various minerals.
Bromine is chemically active. It is a halogen and readily forms compounds with other elements, making it reactive in chemical reactions.
Bromine (Br2) is the third most reactive halogen.
The most common halogen on the periodic table would have to be either chlorine or iodine.