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What is the molecular geometry of NH3?

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Question: What is the molecular geometry of NH3?

Options:

  1. Linear
  2. Trigonal planar
  3. Tetrahedral
  4. Trigonal pyramidal

Correct Answer: Trigonal pyramidal

Solution: 

NH3 has three bonding pairs and one lone pair, resulting in a trigonal pyramidal geometry.

What is the molecular geometry of NH3?

Practice Questions

Q1
What is the molecular geometry of NH3?
  1. Linear
  2. Trigonal planar
  3. Tetrahedral
  4. Trigonal pyramidal

Questions & Step-by-Step Solutions

What is the molecular geometry of NH3?
  • Step 1: Identify the chemical formula, which is NH3 (ammonia).
  • Step 2: Count the number of nitrogen (N) and hydrogen (H) atoms. There is 1 nitrogen and 3 hydrogens.
  • Step 3: Determine the number of bonding pairs. Nitrogen forms 3 bonds with the 3 hydrogen atoms.
  • Step 4: Check for lone pairs on the nitrogen atom. Nitrogen has 5 valence electrons and uses 3 for bonding, leaving 1 lone pair.
  • Step 5: Combine the bonding pairs and lone pairs. There are 3 bonding pairs and 1 lone pair.
  • Step 6: Use VSEPR theory to determine the shape. With 3 bonding pairs and 1 lone pair, the shape is trigonal pyramidal.
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