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

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.

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

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

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

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

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

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?

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?

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

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

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

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?

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?

ANSWERS

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

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

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

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

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

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?

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?

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.

Name the Reactants 2H2 + O2 2H2O

Name the Reactants Na + Cl NaCl

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

Name the Products 2H2 + O2 2H2O

Name the Products Na + Cl NaCl

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