Magnitude of which of the following property of alkali metals increases with the increase of atomic number

Electronegativity

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Ionic radius

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First ionization energy

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Melting point

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Solution

The correct option is B
Ionic radius

Element - Li Na K Rb Cs

Ionic radius - 76 102 138 152 167

as the atomic no. increases the no. of shells increases hence, atomic radius increases.

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