1. Science 9 Unit 2 Review

2. Write the difference between: heterogeneous mixture and a homogeneous mixture a physical change and a chemical change an element and a compound

3. Fill in the blanks If a substance has the ability to burn in oxygen, it has the property of ________. A homogeneous mixture can also be called a ______________. A heterogeneous mixture can also be called a _________________ A substance that cannot be broken down into simpler substances is an _________. The physical property of matter know as mass per unit volume is called __________

4. WHMIS What does the acronym WHMIS stand for? Why was the WHMIS system developed?

5. Chemical Changes List three examples of chemical changes List three examples of physical changes.

6. Laws What is the law of conservation of mass? What is the law of definite composition?

7. Define the following atom proton neutron electron valence electron nucleus (atom)s

8. Draw and Label the Model of a Sodium Atom

9. Corrosive Chemicals Name three examples of highly corrosive chemicals. Name three highly reactive metals.

10. Periodic Table State the element symbol, atomic number, and atomic mass of the following: lithium beryllium phosphorous sulfur

11. Fill in the blanks The _________ table is a collection of elements. Vertical columns in this table are called __________. Horizontal rows in the table are called __________.

12. Periodic Table Which groups are divided by the “staircase” on the periodic table?

13. Periodic Table Identify the following elements as metals, non-metals, or metalloids. carbon (C) oxygen (O) iron (Fe)s silicon (Si) potassium (K) bromine (Br) boron (B) nitrogen (N)

14. Ionic and Molecular Compounds State whether each compound is ionic or molecular: hydrogen peroxide carbon tetrachloride aluminum oxide nitrogen dioxide lithium chloride sodium fluoride

15. Chemical formula Use your textbook to write the chemical formula for the following molecular compounds: sulfur dioxide carbon monoxide carbon tetrachloride propane gas methane gas carbon dioxide

16. Chemical Formula Name the following ionic compounds: NaCl KI AgBr MgO LiCl NaF

17. Chemical Reactions List six observations that would lead you to believe that a chemical reaction occurred.

18. Chemical equations Write the chemical equation for the formation of silver bromide (p. 148) Write the chemical equation for the combustion of methane gas (p. 149)

19. Chemical Equations Write a balanced chemical equation for the following reactions (pp. 148-149): hydrogen gas + oxygen gas -> water magnesium solid + oxygen gas -> magnesium oxide solid

20. Chemical Equations Write a balanced chemical equation for the following reactions (p. 149) methane gas + oxygen gas -> carbon dioxide gas + water vapour

21. Endothermic - Exothermic What is an endothermic reaction? Give an example of this type of reaction. What is an exothermic reaction? Give an example of this type of reaction.

22. Rate of Reaction Describe the effects of the following factors on the rate of a chemical reaction: concentration surface area temperature

23. Corrosion Write the chemical and the word equation for the corrosion of solid iron.

24. Galvanization Why are some metal products, such as nails, galvanized?

25. Combustion What are the beneficial effects of burning fossil fuels? What are the harmful effects of burning fossil fuels?s

26. Explain the differences reactant and product catalyst and inhibitor chemical reaction and rate of reaction