Sodium has ___________ as compared to potassium.

less electronegativity

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more ionization potential

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larger atomic radius

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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 $n s_{1}$ 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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