1. Matter/Energy Review
What are the 3 types of chemical bonds?
Which atomic particle forms chemical bonds?

2. Today’s Goal I can explain how atoms bond with other atoms.
I can list evidence of chemical changes.
I can explain the difference between physical and chemical changes.

3. Words to Know Valence electron Chemical bond Conservation of Mass
Conservation of Energy
Physical Change
Chemical Change
Reactant
Product
Energy
Element
Compound
Molecule

4. 1 Frying an egg 2 Squeeze oranges 3 Melting Ice 4 Mix salt and water
CHEMICAL
PHYSICAL
PHYSICAL
4 Mix salt and water
6 Water evaporating
5 Mix oil and water
PHYSICAL
PHYSICAL
PHYSICAL

5. 1 Cutting grass 2 Burning Leaves 3 Fireworks exploding
CHEMICAL
PHYSICAL
CHEMICAL
5 Crushing a can
4 Cutting hair
6 Boiling water
PHYSICAL
PHYSICAL
PHYSICAL

6. 1 Glass Breaking 2 Hammering Wood 3 Rusting Bike 6 Bleaching Hair
CHEMICAL
PHYSICAL
PHYSICAL
6 Bleaching Hair
4 Melting Butter
5 Separate Sand & Gravel
PHYSICAL
CHEMICAL
PHYSICAL

7. 5. Gives or takes electrons
Name the type of bond: Covalent, Metallic, Ionic 1 2 3 4
5. Gives or takes electrons
6. Shares electrons

8. How many protons does Iron have?
How many electrons does Calcium have?
How many neutrons does Gallium have?
What is the atomic number of Selenium?
What is the atomic mass of Krypton?

9. 6. How many positively charged particles does Chromium have?
7. How many negatively charged particles does Silicon have?
8. How many neutral (no charge) particles does Rubidium have?
What is the atomic mass of Zirconium?
What is the atomic number of Gold?

10. Reactive or Nonreactive?
11. What atom is this?
12.
Reactive or Nonreactive?

11. Reactive or Nonreactive?
13. What atom is this?
14.
Reactive or Nonreactive?

12. Reactive or Nonreactive?
15. What atom is this?
16.
Reactive or Nonreactive?

13. How many valence electrons does Chlorine have?
How many valence electrons does Sodium have?
How many electrons does Oxygen have?
How many electrons does Magnesium have?

14. What is the atomic number of Cadmium?
What is the atomic mass of Molybdenum?
How many protons does Tungsten have?
How many neutrons does Mercury have?
How many neutrons does Bismuth have?

15. ANSWERS

16. How many protons does Iron have? How many electrons does Calcium have?
How many neutrons does Gallium have?
What is the atomic number of Selenium?
What is the atomic mass of Krypton? 26 20 39 34
83.80

17. 6. How many positively charged particles does Chromium have?
7. How many negatively charged particles does Silicon have?
8. How many neutral (no charge) particles does Rubidium have?
What is the atomic mass of Zirconium?
What is the atomic number of Gold? 24 14 49
91.22 79

18. Reactive or Nonreactive?
11. What atom is this?
Fluorine
12.
Reactive or Nonreactive?
Reactive

19. Reactive or Nonreactive?
13. What atom is this?
Helium
14.
Reactive or Nonreactive?
Nonreactive

20. Reactive or Nonreactive?
15. What atom is this?
Sulfur
16.
Reactive or Nonreactive?
Reactive

21. How many valence electrons does Chlorine have?
How many valence electrons does Sodium have?
How many electrons does Oxygen have?
How many electrons does Magnesium have?

22. What is the atomic number of Cadmium?
What is the atomic mass of Molybdenum?
How many protons does Tungsten have?
How many neutrons does Mercury have?
How many neutrons does Bismuth have?

23. Review!
What is a reactant? It is a molecule that is present at the beginning of a chemical reaction. What is a product? It is a molecule that is present after a chemical reaction.

24. Name the Reactants
2H2 + O H2O

25. Name the Reactants
Na + Cl NaCl

26. Name the Reactants
6CO2 + 6H2O O2 + C6H12O6

27. Name the Products
2H2 + O H2O

28. Name the Products
Na + Cl NaCl

29. Name the Products
6CO2 + 6H2O O2 + C6H12O6