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How many lone pairs of electrons exist on the central atom in ammonia (NH3)?

How many lone pairs of electrons are present on the central atom in ammonia (NH3)?

  1. Two
  2. Four
  3. Three
  4. None
  5. One

2 Answers

A
Anonymous

Feb 06, 2025

5. one

The central atom in ammonia is nitrogen which will be connected to three hydrogen atoms. Nitrogen has 5 valence electrons, so if it shares electrons with three hydrogen atoms, it will have one lone pair of electrons.

A
Anonymous

Feb 18, 2025

I think just one because ammonia looks approximately like this:

H

|

:N – H

|

H

N has 5 valence electrons and tries to pull in another three from the hydrogen atoms, leaving the remaining two as an electron pair. So the overall shape is pyramidal

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