Valence Electrons

Presentation

•

Science

•

9th Grade

•

Practice Problem

•

Easy

•

NGSS

MS-ESS1-2, MS-PS1-1, HS-PS1-1

+10

Standards-aligned

AUSTIN WENGER

Used 22+ times

FREE Resource

10 Slides • 22 Questions

Valence Electrons

Labeling

Match the correct parts of an atom.

Drag labels to their correct position on the image

Neutron

Electron

Electron Levels (Shells)

Proton

Nucleus

Match

Match the following

Proton

Neutron

Electron

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

Deg^°

Rad

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

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?

Multiple Choice

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

Multiple Choice

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

Math Response

How many valence electrons does Helium have?

Type answer here

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

How to Draw
Lewis Dot Diagrams

Ne

He

Be

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

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?

Fill in the Blanks

What element does D represent?

Type answer...

Match

Which Groups do each atom belong to?

Group 1

Group 13

Group 2

Group 15

Multiple Select

Name three elements that have this Lewis Dot Diagram.

Bismuth

Phosphorus

Sulfur

Carbon

Nitrogen

Valence Electrons

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