Francium and cesium
These elements are francium and lithium.
Alkali metals in the first group compose the most reactive family of metals.
The most reactive elements in the group of alkali metals are cesium and francium. They are highly reactive due to their low ionization energy and tendency to lose their outermost electron to achieve a stable electron configuration. Due to their reactivity, they are stored under oil to prevent reaction with moisture in the air.
The alkali and alkaline earth metals are the least electro negative elements, and the halogens are the most electro negative elements.
The most reactive metals are the alkali metals in group 1a.
The most reactive goup in the metals is the Alkali metals (Group I) The most reactive non-metal group is Group 17 or VIIA) the Halogens. It is difficult to say which of the two groups is more reactive. Chemists will say that Flourine is the most reactive element. Note that Group 18 is the least reactive, most stable.
The group containing the most reactive elements is Group 1, also known as the alkali metals. These elements include lithium, sodium, and potassium, which are highly reactive due to their low ionization energies and tendency to lose electrons to form positive ions.
Alkali metals are the most reactive group of metals due to their low ionization energy, which allows them to readily lose their outermost electron to form cations. This reactivity increases down the group, with francium being the most reactive alkali metal.
The alkali metals group, located in Group 1 of the periodic table, is the most reactive group of elements. These elements have one electron in their outermost shell, making them highly reactive as they seek to lose this electron to achieve a stable electronic configuration.
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.
For the most part, the Halogen group is the most reactive group on the periodic table. However, the Alkali metals are just as equal but not quite.
The alkali metals, such as lithium, sodium, and potassium, are the most reactive elements in the periodic table. They easily lose their outermost electron to form ions, which leads to their high reactivity.