Molecular Geometry of NH3

The video tutorial explains the molecular geometry of NH3 by first examining its Lewis structure. It describes how the three hydrogen atoms and the lone pair of electrons around the nitrogen atom repel each other, resulting in a trigonal pyramidal shape. The tutorial also introduces the AXN notation, where 'A' represents the central nitrogen atom, 'X' the three bonded hydrogen atoms, and 'N' the lone pair of electrons. The bond angles are noted to be 109.5°. The video concludes with a thank you from Dr. B.

What is the first step in determining the molecular geometry of NH3?

• Using the AXN notation

• Looking at the Lewis structure

• Measuring bond angles

• Counting the number of atoms

What causes the shape of NH3 to form?

• The size of the nitrogen atom

• The repulsion between electron pairs

• The temperature of the environment

• The attraction between hydrogen atoms

What is the molecular geometry of NH3?

• Tetrahedral

• Trigonal planar

• Linear

• Trigonal pyramidal

In the AXN notation for NH3, what does 'X' represent?

• The total number of electrons

• The number of atoms bonded to the central atom

• The number of lone pairs

• The central atom

How many lone pairs of electrons are present in NH3?

• One

• Two

• Three

• None

What is the bond angle in NH3?

• 90°

• 104.5°

• 120°

• 109.5°

What is another name for the trigonal pyramidal shape?

• Linear

• Tetrahedral

• Trigonal paramal

• Trigonal planar