Lewis, VSEPR & Polarity

What is the correct formula for this molecule?

• NH
• N₃H
• NH₃
• NH₄

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

• 2
• 8
• 6
• 18

In the correct Lewis structure for CH_4, how many unshared electron pairs surround the carbon?

• 2
• 8
• 0
• 4

This is the correct dot diagram for sodium (Na)

• true
• false

This is the correct dot diagram for nitrogen (N)

• true
• false

If electrons are shared equally then the bond is....

• Non-polar covalent
• Ionic
• Non-polar ionic
• Polar covalent

If electrons are shared unequally then the bond is....

• Non-polar covalent
• Ionic
• Non-polar ionic
• Polar covalent

Three pairs of electrons are shared in a

• Single bond
• Double bond
• Triple bond

Which molecule would have this shape?

• BF₃
• CH₄
• PCl₅
• CO₂

What molecule could this be? 

• BF₃
• CH₄
• H₂O
• CO₂