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Question

In each period of a periodic table, alkali metals have :

A
lowest ionisation energy
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B
smallest size
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C
lowest electropositivity
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D
highest electronegativity
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Solution

The correct option is D lowest ionisation energy
Ionisation energy is the amount of energy required to remove the outermost electron from a gaseous atom. As alkali metals have the largest size in a period, thus valence electron can be easily removed from the atom.

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