Because to be stable they need 8 atoms on outermost shell.Alkali need 7 so are highly reactive.
The two most reactive groups of elements in the periodic table are the alkali metals and the halogens. Halogens are nonmetals located in group 17 of the periodic table and include elements like fluorine, chlorine, and iodine.
Metals are more reactive elements.
The elements furthest to the left (alkaline earth metals)
The most reactive non-metals are the halogens, group 17.
The very reactive elements are typically found in Group 1 (alkali metals) and Group 17 (halogens) of the periodic table. Alkali metals tend to react violently with water, while halogens are known for their high reactivity and tendency to form salts with metals.
The elements are all metals and are generally reactive.
The reactive group of all metals consists of elements located in Group 1 and Group 2 of the periodic table, known as the alkali metals and alkaline earth metals, respectively. These metals are highly reactive due to their tendency to lose electrons and form positive ions.
Group 1 (metals) and Group 17 (non-metals).
Non-reactive elements in the periodic table are typically the noble gases, such as helium, neon, and argon. These elements have a full outer electron shell, making them stable and less likely to form chemical bonds. Reactive elements are those that readily form chemical bonds with other elements, such as the alkali metals (e.g. sodium, potassium) and halogens (e.g. fluorine, chlorine).
in the Periodic Table it is the most reactive metals!
The column on the far left of the periodic table contains the alkali metals. These elements are highly reactive and have one electron in their outer shell. They include elements such as lithium, sodium, and potassium.
The Alkali metals are the most reactive group of metals in the Periodic Table. Of these Francium is the most reactive metal of all.