MEDIUMMCQ SINGLEJEE Advanced ChemistryInorganic Chemistrys- Block 3.0Previous Year Questions

Which physical property in the alkali metal group increases with atomic number? (AMU 2009)

A.Melting point

B.Electronegativity

C.Hydration enthalpy

D.Density (with exception)✓ Correct

Explanation

Density increases down the group as the atomic mass compensates the atomic radius of the element. But with small exception as Li < K < Na < Rb < Cs. Whereas melting point, electronegativity and hydration enthalpy decrease down the group due to large atomic size.

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