Review Lewis Structures of Covalent Bonds

Lewis Structure Review

Objective: Master Lewis Structures of molecules with single, double, triple baonds for covalent molecules and ions.

Multiple Choice

This is the correct dot diagram for sodium (Na)

• true
• false

Multiple Choice

This is a correct dot diagram for fluorine (F)

• true
• false

Multiple Choice

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

• 4
• 6
• 8
• 2

1. Draw Lewis dots for all atoms in the formula

2. Draw circles around shared electrons (puzzle!)

3. Check that all atoms follow the octet rule at the end

Drawing Lewis Structures

Multiple Choice

Which of these is the correct Lewis structure for SiBr₄?

• A

• B

• C

• D

Multiple Choice

What is the correct Lewis structure for NH₃?

Multiple Select

Why is this Lewis Structure incorrect? Choose all that apply.

• There are too many bonds around Si.

• There should only be single bonds in this Lewis Structure.

• The Structure is missing a triple bond.

• Chlorine only has 6 electrons surrounding it.

Multiple Choice

What is the correct formula for this molecule?

• Si₄F
• SiF₄
• SiF
• Si₄F₄

Multiple Choice

Which of the following is the correct Lewis structure for water?

• A
• B
• C

Multiple Choice

Which of the following is an acceptable Lewis structure for CH₃Cl?

• Option A
• Option B
• Option C
• Option D

Multiple Choice

Is this the correct structure for CH₂O?

• Yes

• No

Multiple Choice

Which of the following is the correct Lewis structure for CH₂O?

• Option A
• Option B
• Option C
• Option D

Multiple Choice

Which is the correct molecular structure for carbon dioxide?

Multiple Select

Why is this Lewis Structure incorrect? Select all that appy.

• There should be a single bond between H and C.

• There should be a triple bond between C and N.

• Carbon has too many bonds around it.

• Hydrogen needs more electrons.

​Numbers of preferred valence electrons:

Most common violations we will see in this class....

Multiple Choice

The Lewis structure of the CO₃^2- ion is

Draw

Draw the Lewis Structure for HCl