Quiz 9: Lewis Dot Molecules and VSEPR

How do covalent bonds form?

• Donating & receiving valence e- between atoms.
• Opposite slight charges attract each other between compounds.
• Scientists are still not sure how they form.
• Sharing valence e- between atoms.

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

• 2

• 8

• 6

• 18

Hydrogen needs _____ electrons to be stable.

• 4

• 6

• 8

• 2

Which molecule is held together by the strongest bond?

• H2

• O2

• N2

Which molecule is held together by the bond that is longest in length?

• H2

• O2

• N2

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

• A
• B
• C
• D

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

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

What is the molecular formula of the compound shown in the Lewis Dot Diagram?

• NH₃

• NH

• N₃H

• HN₂

What is the correct structure of O₂?

• 
• 
• 
• 

Which is the correct molecular structure for carbon dioxide CO₂?

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• 
• 
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