Unit 5: Intra and Intermolecular Forces

Which of the following is the correct Lewis dot structure for the molecule fluorine (F₂)?

• A
• B
• C
• D

How many electrons does each line indicate are shared?

• 1
• 2
• 3
• 4

Which of the following is the correct Lewis structure for the compound PBr₃?

• structure A
• structure B
• structure C
• structure D

In CO₂, how many UNSHARED pairs of electrons does each oxygen have?

• 2
• 1
• 4
• 6

What is the correct Lewis Dot Structure for ammonia NH3

• 
• 
• 
• 

In HCN (Carbon is usually the central atom) what kind of bond is between the C and N

• Single

• Double

• Triple

Hydrogen needs _____ electrons in its valence shell to be stable.

• 4
• 6
• 8
• 2

According to the octet rule most elements need _______ valence electrons.

• 2
• 8
• 6
• 18

 A lone pair is defined as

• A pair of bonding electrons
• One non-bonding electron
• A pair of non-bonding electrons
• A pair of electrons on the central atom

Choose the correct shape for this molecule:

• Trigonal planar

• Trigonal pyramidal

• Bent

• Tetrahedral