Assertion (A): Alkaline earth metals are harder than alkali meatals.
Reason (R ): Atomic radii of alkaline earth metas are smaller thant the corresponding alkali metals in the same period.

Why alkaline earth metals are harder than alkali metals.

Assertion : Alkaline earth metals are harder than alkali metals Reason : Atomic radii Qf alkaline earth metals are smaller than corresponding alkali metals in the same periods of periodic table

Why are alkaline earth metal smaller than the Corresponding alkali metals.

Explain why alkaline earth metals are harder than alkali metals ?