Question

Sodium is more reactive than lithium. Why?

Answer 1

Sodium is more reactive than lithium because sodium is larger in size. Outermost electrons are less tightly held in sodium than in lithium. As a result, sodium loses its outermost electron more easily than lithium. Hence, it is more reactive than lithium.

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Answer 2

Sodium has one shell extra as compared to Lithium. Hence, the valence electron experiences less force in the case of sodium. Thus, Sodium is more reactive than Lithium.