Alkali metals are not found in their free state in nature because

a) They have high ionization enthalpy.
b) They readily form monovalent ions.
c) They have low atomic and ionic radii.
d) They are highly electronegative.

Answer: b) They readily form monovalent ions.

Explanation: Alkali metals have a tendency to lose electrons and form monovalent ions, which prevents them from being found in their free state.


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