advantages of salt-alkali free reactive dyeing
Alkali metals such as sodium and potassium are found in nature in various compounds, but they are not typically found in their pure form. They are highly reactive and readily react with other elements to form compounds.
Alkali metals are very reactive, easily react with water, the have the valence is +1, they doesn't exist free in the nature, etc.
Group 1 (alkali metals) and Group 17 (halogens) in the periodic table contain elements that are highly reactive and are never found in their free state in nature. Alkali metals readily react with water or air, while halogens are highly reactive nonmetals that form compounds with other elements quickly.
The group you're thinking of is group 1, the alkali metals. They include sodium and potassium, and you're right, they are so reactive that they do not exist by themselves. They only exist in compounds with other elements.
Sodium (Na) is a highly reactive element so it cannot be found in free state but we can have it in compound form like NaCl.
Alkali metals are very reactive.They have free electron in their outermost shell which is responsible for high reactions.For example : Lithium metal.
Alkali metals from group 1 are very reactive and can easily react with air or moisture to form compounds. Halogens from group 7 are also highly reactive and tend to form compounds with other elements to satisfy their valence electron configuration. Therefore, it is more common to find them as compounds rather than in their free elemental form.
They are so reactive they even react with the moisture in the air. Storing under oil prevents this.
Alkali metals are highly reactive due to their tendency to lose an electron, which makes them prone to forming compounds with other elements rather than existing in their pure, free state in nature. They readily react with moisture, oxygen, and other substances in the environment, which prevents them from being found free in nature.
Advantages and disadvantages of free hand
All Alkali metals show metallic lustre ,which can be explained by the oscillation of free electrons.
Alkali Metals belong to group 1 of periodic table. They have one electron in last or valence shell and are highly electropositive and have low value of Ionisation enthalpy. So the removal of last electron to form a cation(positively charged ion) is very easy and needs less energy as compared to other elements. As a result of this Alkali metals are highly reactive and readily form ionic compounds. Due to this they react with other elements or compounds and form ionic compound. Hence, they are found in their compounds and not in free state.