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Q. Alkaline earth’s metals are denser than alkali metals, because metallic bonding in alkaline earth’s metal is

UPSEEUPSEE 2012The s-Block Elements

Solution:

Alkaline earth metals $\left(n s^{2}\right)$ are denser than alkali metals $\left(n s^{1}\right)$ because metallic bonding in alkaline earth metals is stronger than alkali metals due to presence of two electrons in valence shell as compared to one electron in alkali metals.