1. Week of January 6

2. Bell Work for January 6, 2019 Directions: Write the sentences and answers on your paper

3. Bell Work for January 7, 2019 Directions: Write the questions and answers on your bell work paper. Your answer doesn’t have to be correct, but at least try to answer the questions.
What do valence electrons do?
What is the difference between an element and a compound?

4. The rest of the answers for yesterday’s worksheet…
There has been a change of plans. I will provide the rest of the answers for the “Review Digital Lesson Worksheet” from yesterday and it will become your notes.
You will receive a copy of the worksheet to keep and write on if you want. When you finish copying the answers show me for a grade. If you were not here yesterday, copy the answers from someone else then show me when you are done (today or tomorrow)

5. Write the following…
Write “Chemical Bonding Review Notes” next to the title “Review Digital Lesson Worksheet”
Write the following notes on the back of the “Review Digital Lesson Worksheet”:
-During a chemical change atoms are not created nor destroyed
-Electrons may be transferred from one atom to another
-Chemical bonds may break or be formed, but the number and type of each atom is conserved

6. Opposites Attract What is an ion?
Unit 3 Lesson 4 Ionic, Covalent, and Metallic Bonding
Opposites Attract
What is an ion?
An atom has a neutral charge because it has an equal number of electrons and protons.
An ion is a particle with a positive or negative charge.
An ion forms when an atom gains or loses electrons from its outer, or valence, shell.
Copyright © Houghton Mifflin Harcourt Publishing Company

7. Examples of ions

8. How does an ionic bond form?
Unit 3 Lesson 4 Ionic, Covalent, and Metallic Bonding
How does an ionic bond form?
An ionic bond is a force that brings oppositely charged ions together.
Ionic bonds form when electrons are transferred from a metal atom to a nonmetal atom.
In the process of ionic bonding, valence electrons move from the outer shell of the metal atom to the outer shell of the nonmetal atom.
Copyright © Houghton Mifflin Harcourt Publishing Company

9. How does an ionic bond form?
Unit 3 Lesson 4 Ionic, Covalent, and Metallic Bonding
How does an ionic bond form?
How are the sodium and chlorine atoms held together in the compound sodium chloride?
Copyright © Houghton Mifflin Harcourt Publishing Company

10. Ionic Bond Introduction Video
Follow the directions below:
Write at least 3 sentences describing what was shown in the video (to prove you have been paying attention)

11. Unit 3 Lesson 4 Ionic, Covalent, and Metallic Bonding
What properties do most ionic compounds share? (Crystal Lattice Structure)
When ions bond, they form a repeating three-dimensional pattern called a crystal lattice.
Each ion has many oppositely charged ions around it, and every ion is held firmly in place with strong bonds.
It takes a lot of energy to separate these ions from one another. So most ionic compounds have high melting and boiling points.
Copyright © Houghton Mifflin Harcourt Publishing Company

12. What properties do most ionic compounds share?
Unit 3 Lesson 4 Ionic, Covalent, and Metallic Bonding
What properties do most ionic compounds share?
Sodium chloride consists of sodium and chloride ions held together in a crystal lattice structure.
Copyright © Houghton Mifflin Harcourt Publishing Company

13. What properties do most ionic compounds share? (Brittleness)
Unit 3 Lesson 4 Ionic, Covalent, and Metallic Bonding
What properties do most ionic compounds share? (Brittleness)
The crystals of ionic compounds are hard and brittle.
Striking a crystal of an ionic compound with a hammer will likely shatter the crystals in many places.
Copyright © Houghton Mifflin Harcourt Publishing Company

14. Unit 3 Lesson 4 Ionic, Covalent, and Metallic Bonding
What properties do most ionic compounds share? (Electrical Conductivity)
Solid ionic compounds are poor conductors of electric current, because the ions are held tightly in place.
Melting an ionic solid, however, allows the individual ions to move around. Melted ionic compounds can conduct an electric current.
Ionic compounds dissolved in water can also conduct an electric current.
Copyright © Houghton Mifflin Harcourt Publishing Company

15. Formative Assessment 1. What is an ion?
2. How does an atom develop a charge?
3. How does an atom develop a negative charge?
4. How does an atom develop a positive charge?
5. What is a crystal lattice?

16. Ionic Bonding Worksheet (Guided Practice)
You will work on the worksheet