Chemistry

CHEMISTRY UNIT TEST REVIEW SHEETS

1. What are the 5 statements of the particle theory (remember ASMILe)
2. What is the scientific name for particles?
3. Approximately, how many elements are there on earth?
4. Where are these elements listed?
5. What do you call the smallest particle of an element?
6. If two elements are chemically combined as a pure substance what do we call this substance?
7. What is the smallest particle of a compound?
8. What is the difference between a pure substance and a mixture?
9. Using the symbols Ž for carbon,  for oxygen and ‘ for hydrogen draw the following:
10. a. a single carbon dioxide molecule (CO )

b. 2 atoms of hydrogen

c. a mixture of 3 carbon atoms and 3 oxygen atoms

d. a 2 mixture of 3 water molecules (H 0) and 3 carbon monoxide molecules (CO)

1. Complete the chart: substance element or compound atom or molecule number of each type of atom CaCO4 H2 He C H6 12 6 O 11. Where are metals found on the periodic table? 12. List 5 properties of metals 13. What is an alloy? 14. Name 2 elements in the same group as aluminum 15. Name 2 elements in the same period as aluminum 16. What are the 3 types of subatomic particles and list their charge. 17. If an atom were the size of a football field, how big would the nucleus be? 18. Draw a Rutherford Bohr diagram for carbon and argon. 19. What observation can you make about elements in the same group on the periodic table? 20. What are 5 signs a chemical change has taken place? 21. What is the difference between a physical change and a chemical change? 22. What is the hottest part of a bunsen burner flame? 23. How do you test for oxygen gas? How do you know if oxygen is present? 24. How do you test for hydrogen gas? How do you know if it is present? Remember to put your name on your answers and hand them in for bonus marks!!!