Question

Why does NH3 act as a Lewis base.?​

Answer 1

Answer:

NH3 acts as a Lewis base because it has lone pair of electrons. Lewis base is a compound who has the ability to donate (share) lone pair of electrons. NH3 has a lone pair of electron which is easily donated to electron deficient species to form a bond. So, NH3 is a Lewis base.

Explanation:

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Answer 2

Answer:

Ammonia (NH3), shown in the middle, has a lone pair of electrons, and since nitrogen is more electronegative than hydrogen, the nitrogen atom has a partial negative charge (red color). In this diagram, NH3 acts as a Lewis base,when it donates its lone pair of electrons to BF3.