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Characteristics of s- Block Elements

In each perio...

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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