Which of the following is not an element? 1. carbon 2. carbon dioxide

2. Which of the following is not an element? 1. carbon 2. carbon dioxide 3. nitrogen 4. phosphorus

3. A Identify and describe the two parts of a solution. Solute – what is dissolved Solvent – What does the dissolving B

4. A chemical formula like H2O represents an element 2. an atom    an electron  4. a compound

5. A substance made up of two or more elements that have been chemically combined is a COMPOUND.

6. A substance made up of two or more elements that have been physcially combined is a MIXTURE.

7. 1. In lemonade, the lemonade mix is called the 1. solute. 2. solvent. 3. colloid. 4. solution. 2. In lemonade, the water is called the 1. solute. 2. solvent. 3. colloid. 4. solution.

8. Which of the following would help sugar dissolve faster in water? stirring the water decreasing the solubility of sugar using larger particles of sugar decreasing the water temperature

9. # of protons 35

10. # of protons 48

11. # of protons 12

12. D Identify the sections of the periodic table. Noble gases B A C

13. Elements at the left of the periodic table are known as METALS

14. Elements at the right of the periodic table are known as NONMETALS

15. They have the same (BUT NOT IDENTICAL) properties. What do we know about the elements in group (14)?

16. Explain what occurs to the atomic number when moving from left to right on the periodic table. Atomic number increases.

17. 1. Where are metals located? 2. Where are nonmetals located? 3. Where are metalloids located? 4. Where are noble gases located? To the left of the zigzag line To the right of the zigzag line Touching the zigzag line Group 18

18. Which element is a noble gas? hydrogen oxygen neon nitrogen

19. Identify the solid, liquid and gas! Support your answer. Liquid - Atoms are loosely packed Solid - Atoms are tightly packed Gas - Atoms are very loosely packed

20. Identify the phase change described. 1. Solid to liquid: 2. Gas to liquid: 3. Liquid to solid: 4. Solid to gas: 5. Liquid to gas: 6. Solid to gas: melting condensation freezing sublimation vaporization deposition

21. For each phase change describe whether energy is RELEASED or ABSORBED. 1. Melting: 2. Freezing: 3. Vaporization: 4. Sublimation: 5. Condensation: 6. Deposition: ABSORBED RELEASED ABSORBED ABSORBED RELEASED RELEASED

22. The particles of a substance are closest together in a solid a liquid a gas plasma

23. The particles of a substance move most readily in a solid a liquid a gas

24. The particles of a substance that does not have a definite volume or shape is a solid 2. a liquid 3. a gas

25. Attractive forces are very strong between particles in 1. a solid 2. a liquid 3. a gas 4. plasma

26. When a liquid becomes a solid, energy does not change is released is absorbed is first absorbed, then released

27. _______ is the process in which liquid changes to gas. 1. Sublimation2. Condensation 3. Evaporation4.Combustion

28. The change of a liquid to a solid is called 1. freezing 2. melting 3. sublimation 4. vaporization

29. When substances go directly from the solid phase to the gas phase, the phase change is called 1. sublimation 2. condensation 3. evaporation 4. vaporization

30. For the following pictures, identify whether a physical or chemical change is occurring.

31. Identify whether this is a physical or chemical change. Support your answer. Physical – No new substance was produced.

32. Chemical – Carbon dioxide was produced.

33. Chemical – ash and carbon dioxide were produced

34. Physical – Nothing new was produced. The ice is melting.

35. Physical – Nothing new was produced. The substance is being grinded into smaller particles.

36. Chemical – Rust (iron oxide) was produced.

37. Chemical – The Alka-Seltzer tablet released carbon dioxide into the water.