Test 7- Intermolecular Forces

Question 1

Name the compound

Answer 1

If metal and nonmetal 
- Name first element 
- Second element with -ide
If 2 nonmetals 
- Name first element 
- greek prefix and ide on second one

Question 2

Determine the bond type (give the electronegativities)

Answer 2

• Subtract en
• nonpolar covalent- 0-0.4
• polar covalent- greater than 0.4 or less than or equal to 1.9
• Ionic if above 1.9

Question 3

Draw lewis dot diagram

Answer 3

• Higher EN goes in the middle
• Make sure each has 8
• H-2
• B-6
• Be-4

Question 4

Determine the shape of the molecule

Answer 4

Use Lone/bonded pairs

Question 5

0/2

Answer 5

Linear- 180

- Looks like a line

Question 6

0/3

Answer 6

Trigonal planar- 120`

- Flat- 3 evenly spaced

Question 7

0/4

Answer 7

Tetrahedral

-

Question 8

1/3

Answer 8

Trigonal pyramidal

-

Question 9

2/2

Answer 9

Angular or bent

-

Question 10

Linear angle

Answer 10

180

Question 11

Trigonal planar angle

Answer 11

120

Question 12

Tetrahedral angle

Answer 12

109.5

Question 13

Trigonal pyramidal angle

Answer 13

107

Question 14

Angular or bent angle

Answer 14

105

Question 15

Molecular Polarity

Answer 15

• Polar if dipoles are not equally distributed
• Usually nonpolar
• Polar if theres a lone pair

Question 16

Strongest-weakest IMF

Answer 16

1. Hydrogen bond
2. Dipole-Dipole
3. London Dispersion

Question 17

How to determine strongest IMF

Answer 17

• All have LDF
• Hydrogen if contains hydrogen
• D-D if lone pair