Module 2 Chapter 5 Lesson 2 - Bond Angles

Question 1

Where is there the most amount of repulsion between electron pairs?

Answer 1

Between two lone pairs.

Question 2

Where is there the least amount of repulsion between electron pairs?

Answer 2

Between two bonding pairs.

Question 3

What is the minimum amount of atoms needed for a bond angle?

Answer 3

3

Question 4

What is the shape of a simple molecule?

Answer 4

Determined by electron repulsion.

Question 5

Explain electron repulsion theory.

Answer 5

Shape determined by electron repulsion.
Will repel each other and take positions as far apart as possible.
Arranged to produce the minimum amount of repulsion between them.

Question 6

Why does BeCl2 have intermediate bonding?

Answer 6

Small ionic radius
2+ charge
High concentration of change
So cl can’t take electrons
So gives covalent characteristics.

Question 7

What is the shape and angle of a molecule with 2 bonding pairs and 0 lone pairs?

Answer 7

Linear
180

Question 8

What is the shape and angle of a molecule with 3 bonding pairs and 0 lone pairs?

Answer 8

Trigonal Planar
120

Question 9

What is the shape and angle of a molecule with 4 bonding pairs and 0 lone pairs?

Answer 9

Tetrahedral
109.5

Question 10

What is the shape and angle of a molecule with 5 bonding pairs and 0 lone pairs?

Answer 10

Trigonal Bipyramidal
(90)/(120)

Question 11

What is the shape and angle of a molecule with 6 bonding pairs and 0 lone pairs?

Answer 11

Octahedral
90

Question 12

What is the model layout for a question on how answer a question on bond angles?

Answer 12

Electron pairs repel
State the numbers of bonded pairs and lone pairs and in case of double bonds (regions of electron density around the central atom).
Bonded pairs repel equally
Lone pair of electrons repel more than bonding pairs.

Question 13

What is double/triple bonds treated as in bond angles.?

Answer 13

ONE bonding pair

Question 14

What do you have to do when there is a lone pair in the structure?

Answer 14

• 2.5 degrees PER pair.

Question 15

What do you call a double bond in bond angles in an exam?

Answer 15

Region of electron density.