1. ELEMENTS/COMPOUNDS METALS/NONMETALS/METALLOIDS Chemical/Physical Changes

2. Where are the metals, metalloids, & non-metals located on the Periodic Table? Metals = Left of zig-zag Metalloids = on the zig-zag line Non-metals = right of the zig-zag

3. What are the 5 signs that a chemical change has occurred? 1.Color Change 2.Gas given off (bubbles) 3.Temperature change 4.New substance formed 5.Fire

4. Complete the chart listed below: SampleChemical Symbol/Formula Element or Compound 1H2 2NaCl 3N2O 4ni 5Al 6H2SO4 7fe Element Compound Neither

5. Why would trail mix not be considered a compound? b/c you can easily separate the ingredients out

6. Does the following picture represent an element or compound? Compound

7. What are 3 properties of metals? 1)Malleable/Ductile 2)High Luster 3)Good conductor of electricity

8. What is a precipitate? It’s when 2 liquids are mixed together and form a solid

9. What is an element? A pure substance made up of identical atoms

10. What are 3 characteristics of a non- metal? 1)Brittle 2)Low Luster 3)Poor Conductor of electricity

11. Which of the following substances listed can be separated into several elements? A) Sulfur B) Neon C) Carbon Dioxide D) Oxygen C – Carbon Dioxide (it’s a compound)

12. Does the picture below represent an element or compound? Explain. Element – it’s all 1 color

13. What are elements represented by on the Periodic Table? Symbols

14. What is the difference between an element and a compound? An element is a pure substance; a compound is 2 or more elements chemically combined

15. Label the following as elements or compounds: NaCl: He: N 2 SO 4 : H: cl: OH: Compound Element Compound Element Neither Compound

16. Carbon is considered an element, while carbon dioxide is considered a compound. This is because carbon dioxide is – Made up of 2 elements that are chemically combined

17. Identify how many elements are in the following chemical formulas: Al: Na 2 SO 4 : H 2 O: C 6 H 12 O 4 : h: 1 3 2 3 0

18. Use the chart below to determine which sample is a metal, metalloid, or non-metal. SampleLusterMalleabilityConductor?Classification 1HighYesConductor 2HighNoSemi- Conductor 3LowNoInsulator 4LowYesSemi- Conductor Metal Metalloid Non-Metal Metalloid

19. When conducting an experiment, Lauren found that when you add Iodine to a cracker, the cracker changes color. Is this a chemical or physical change? How do you know? Chemical Change – color change

20. Katrina was conducting an experiment with 2 unknown liquids. When she mixed them together a white solid formed in the beaker. What type of reaction is this? How do you know? Chemical Change – formation of a new substance (precipitate)

21. Label the following as metals, nonmetals, or metalloids: -When John conducted an experiment on an unknown substance, he found that when touched w/ electrical wires, the light bulb lit up, it was shiny, and could be bent w/o breaking Metal

22. When conducting an experiment w/ an unknown substance, Will found that when touched with electrical wires nothing happened, the substance was not shiny, and broke easily. How would you classify this substance? Non-Metal

23. What are metalloids? 1.Semi-conductors of electricity 2.Has properties of both metals & nonmetals

24. The table shows the properties of three classifications of elements. What are the best headings for columns A, B, and C? A) Non-Metals B) Metalloids C) Metals

25. The table shows the physical properties of four elements. Which element is classified as a metalloid? Polonium

26. When conducting an experiment w/ an unknown substance, Adam found that when touched with electrical wires nothing happened, the substance was not shiny, and broke easily. How would you classify this substance? Nonmetal

27. Identify the following as an element or compound: -Baking a cake -Cutting your hair -Making a salad -Lighting a match Chemical Change Physical Change