2. 1.Label the substances as either elements or compounds. Fe 2 ________________ K________________ NaCl________________ NaCO 3 ________________ He________________ H 2 O________________

3. 2. The word pure refers to what?

4. 3. Write a chemical symbol with two letters correctly.

5. 4. Write a compound correctly. (It can be made up)

6. 5. An ounce of copper can be spun into wires. What term is used to describe this physical property of copper?

7. 6. Which column indicates only a chemical change? 1234 Silver tarnishesIce meltingChalk fizzingBurning wood Bike rustingPaper tearingSugar dissolvingCutting wood

8. 7. Which substance best represents a compound? 1Made of one type of matter 2Will not separate easily 3Separated easily

9. 8. Jerry was investigating a mystery substance. He observed the substance was shiny in luster, he could hit the substance and it did not break, and lit up a bulb when connected to a battery. The substance is most likely a what?

10. 9. Nine grams of a green solid is added to 20 grams of water at 12⁰C. Which observation best indicates that a chemical reaction occurred in the solution? A.The total mass of the solution was 29 grams B.The substance was green C.The temperature increased from 12⁰C to 32⁰C

11. 10. What is the difference between Oxygen and Glucose? GlucoseC 6 H 12 O 6 Sodium ChlorideNaCl OxygenO2O2 Hydrochloric AcidHCl

12. 11. Which substances are elements? 1Ca 2H 2 SO 4 3rb 4H2OH2O 5K 6HOP

13. 12. Three substances are mixed with a clear liquid. Which mixture most likely reacted chemically? SubstanceBefore mixingMixture 1Amber liquidPale amber liquid 2Clear liquidGreen liquid 3Red crystalsRed liquid

14. 13. How many sulfur atoms are in the formula Na 2 SO 4 ?

15. 14. List 3 examples of evidence of NOT a chemical change.

16. 15. Which substance is most likely a metalloid? SubstanceLusterMalleability / Ductility Conductivity 1NoneNoInsulator 2HighYesConductor 3HighNoSemi- conductor 4LowNoInsulator

17. 16. A pure substance that cannot be broken down is called what?

18. 17. Which mystery substance is a nonmetal? 1Dull, yellow, powdery solid, smells like eggs, brittle 2Silvery-gray, solid, shaped into a bar, malleable 3Reddish-brown, shiny solid, shaped into a wire, can be stretched, malleable

19. 18. Tina combined two liquids in the lab. In which experiment did a chemical change NOT take place? 1The liquids changed from clear to dark green 2One liquid settled to the bottom 3Bubbles formed

20. 19. What is the difference in grams between the total mass of the liquids and the total mass of the solids? Water125 Toothpicks5 Marbles40 Oil75 Sugar cubes20 Alcohol98

21. 20. How many atoms of each element are in the following compound? CaCO 3 Ca _________ C __________ O __________

22. 21. Which section holds the nonmetals? 2 1 3