Valence Electrons

Valence Electrons

Labelling

Match the correct parts of an atom.

Drag labels to their correct position on the image

Nucleus

Electron Levels (Shells)

Electron

Proton

Neutron

Match

Match the following

• Proton

• Neutron

• Electron

Positive charge

No charge

Negative charge

• Positive charge

• No charge

• Negative charge

Multiple Choice

What is the charge of the NUCLEUS of an atom?

• Neutral

• Positive

• Negative

• Depends on the atom

Multiple Choice

What is the charge of the WHOLE ATOM?

• Neutral

• Positive

• Negative

• Depends on the atom

Math Response

How many electrons does Carbon have?

Type answer here

Correct Answer: 6

Deg^°

Rad

The electrons in the highest, unfilled energy level are called VALENCE ELECTRONS.

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These electrons interact with different atoms.

Valence Electrons

Multiple Choice

The electrons in the highest, unfilled energy level of an atom are called...

• core electrons
• valence electrons
• inner electrons
• subvalence electrons

​

Multiple Choice

How many electron levels (shells) do all the elements in the fourth period have?

• 2
• 3
• 4
• 1

​

Multiple Choice

How many valence electrons do all the elements in Group 2 have?

• 6

• 1
• 8

• 2

Multiple Choice

How many valence electrons do all the elements in Group 16 have?

• 6

• 1
• 8

• 2

Math Response

How many valence electrons does Helium have?

Type answer here

Correct Answer: 2

Deg^°

Rad

Multiple Choice

Which element has 2 electron levels (shells) and 3 valence electrons?

• Magnesium

• Boron

• Calcium

• Aluminum

Multiple Choice

Which element has 6 electron levels (shells) and 2 valence electrons?

• Molybdenum

• Barium

• Oxygen

• Sulfur

Why are these important?

The valence electrons are the electrons that are responsible for chemical bonding.

-Ionic Bonds

-Covalent Bonds

-This is how atoms make molecules BUT drawing all the electron shells is unnecessary.
-See which electrons are bonding?

Chemical Bonds

-A way to represent an atom’s valence electrons
-Shows the element symbol surrounded by one to eight dots

-​Each dot represents one electron

Lewis Dot Diagram

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How to Draw
Lewis Dot Diagrams

​Ne

​He

​Be

​Note: Each side will get one electron before any side gets two electrons.

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Draw

Draw a Lewis Dot Diagram for Carbon.

Draw

Draw a Lewis Dot Diagram for Silicon.

Draw

Draw a Lewis Dot Diagram for Argon (18).

Draw

Draw a Lewis Dot Diagram for Helium.

Draw

Draw a Lewis Dot Diagram for Potassium (19).

Draw

Draw a Lewis Dot Diagram for Iodine (53).

Review

Multiple Choice

Which of these diagrams shows 3 valence electrons?

• A

• B

• C

• D

Fill in the Blanks

Match

Which Groups do each atom belong to?

• Group 1

• Group 13

• Group 2

• Group 15

A

B

C

D

• A

• B

• C

• D

Multiple Select

Name three elements that have this Lewis Dot Diagram.

• Bismuth

• Phosphorus
• Sulfur

• Carbon
• Nitrogen