Lithium, sodium potassium belong to same group called alkali metals. Why?
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becouse, they have same valance electron ✌️✌️
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Lithium, Sodium, and Potassium, all these metals have a similar electronic configuration due to same number of valence electrons. And, as the total number of valence electrons decide one's group number. Thus, they belong to same group and are called as Alkali Metals.
All these metals have '1' as their valence electrons.
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