Seesaw Molecular Geometry Concepts

The video tutorial explains the Seesaw molecular geometry, characterized by a steric number of five, with four atoms and one lone pair attached to the central atom. SF4 is used as an example to illustrate this geometry. The tutorial also covers the 3D representation of the Seesaw shape, highlighting the bond angles of 180°, 90°, and 120°. Additionally, the AXE notation is introduced to help determine the molecular geometry, with 'A' representing the central atom, 'X' the bonded atoms, and 'E' the lone pair.

What is the steric number for a molecule with Seesaw geometry?

• 5

• 4

• 3

• 6

In the Seesaw molecular geometry, how many atoms are bonded to the central atom?

• 5

• 4

• 3

• 2

Which molecule is a classic example of Seesaw molecular geometry?

• CH4

• SF4

• NH3

• H2O

In the SF4 molecule, what role does the lone pair play in its geometry?

• It increases the bond angles.

• It has no effect on the geometry.

• It occupies space and affects the shape.

• It forms a bond with another atom.

What is the bond angle between the atoms in a straight line in Seesaw geometry?

• 90°

• 120°

• 180°

• 60°

Which bond angle is NOT present in the Seesaw molecular geometry?

• 180°

• 120°

• 90°

• 109.5°

What does 'A' represent in the AXE notation for molecular geometry?

• The total number of atoms

• The number of lone pairs

• The central atom

• The number of bonds

In AXE notation, what does 'X' stand for?

• Lone pairs

• Central atom

• Total atoms

• Bonded atoms

How many lone pairs are represented by 'E' in the AXE notation for SF4?

• 0

• 3

• 2

• 1

What is the correct AXE notation for a molecule with Seesaw geometry?

• AX3E2

• AX4E

• AX5

• AX2E3