JEE Main Chemistry question

Compared with the alkaline earth metals, the alkali metals exhibit

(A)Greater hardness
(B)Smaller ionic radii
(C)Lower ionisation energiesCorrect
(D)Highest boiling points

Answer: (C)

Solution

Alkali metals are softer (not harder, ruling out A), have larger (not smaller, ruling out B) ionic radii than the alkaline earth metals of the same period because they have one fewer proton pulling on a similar electron shell, and they have lower boiling points, not higher (ruling out D), as weaker metallic bonding

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Question ID VK-137721