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Question

Sodium has ___________ as compared to potassium.

A
less electronegativity
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B
more ionization potential
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C
larger atomic radius
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D
lower melting point
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Solution

The correct option is B more ionization potential
Alkali metals can readily lose their one electron to form +1 oxidation state and can easily ionize this electron and this ns1 configuration results in alkali metals to have large ionic and atomic radii and they have high second ionization energy. This ionization energy decreases down the group.

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