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The alkaline earth metal harder than gla...

The alkaline earth metal harder than glass

A

Be

B

Mg

C

Ca

D

none of these

Text Solution

Verified by Experts

Beryllium is harder than glass.
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Explain why alkaline earth metals are harder than alkali metals ?

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.

Alkaline earth metals are denser than alkali metals, because metallic bonding in alkaline earth metals is