Here's why:
* Reactivity: Alkali metals are the most reactive group of metals in the periodic table. They readily lose their single valence electron, making them highly reactive with other elements.
* Combining with other elements: Alkali metals readily form ionic compounds with nonmetals. For example, sodium (Na) reacts violently with chlorine (Cl) to form sodium chloride (NaCl), commonly known as table salt.
Examples of alkali metals include:
* Lithium (Li)
* Sodium (Na)
* Potassium (K)
* Rubidium (Rb)
* Cesium (Cs)
* Francium (Fr)
It's important to note that while all alkali metals are highly reactive, their reactivity increases as you go down the group. This is due to the increasing atomic radius and decreasing ionization energy.
