Questions about the chapter



Chapter 1 Homework Assignment For the quiz on February 4

In the textbook: Read Chapter 1, Classification of Matter and Appendix 1, Metric System.

Memorize the metric system units and prefixes.

Memorize the names and chemical symbols for the first 10 elements on the periodic table.

On the internet: The main page of the 104 website has links to three websites about the periodic table of the elements: WebElements Periodic Table, Periodic Table Live!, and Periodic Table of Videos. Browse the sites to see what types of information they provide.

Questions about the chapter:

1. Compare the properties of a wooden platform, a concrete sidewalk, and a grassy lawn.

2. Which type of jacket has the best performance on a rainy day: a wool blazer, nylon windbreaker, microfiber trenchcoat, or cotton sweatshirt? What properties are related to the material's performance?

3. What kind of room could use each type of flooring material: concrete; nylon carpet; slate; vinyl; wood? List the pros and cons for each.

4. What materials have provided names for historical eras?

5. For each class of material (metal, polymer, ceramic) name two common objects that are composed of different chemicals. List their chemical and physical properties.

6. Decide if each of the following is a physical or chemical property of a substance:

a. density

b. electrical conductivity

c. flammability

d. mass

7. Rank the following lengths from largest to smallest: 1 km, 10 nm, 100 m

8. A sample has mass 5.34 g and volume 2.19 mL. What is its density?

9. Fill in the table with "yes" or "no" depending on whether a class of materials usually demonstrates the property.

| |metal |polymer |ceramic |

|conducts heat | | | |

|ductile | | | |

|flammable | | | |

10. What types of particles are found in atoms?

11. What properties would you predict for element 114, Uuq?

12. Determine the number of protons and electrons for each atom or ion.

a. C b. Cl- c. Mg2+ d. W

13. Tell the number of valence electrons for each atom.

a. C b. Cl c. Mg d. W

14. Predict the most stable ion formed by each atom.

a. Al b. S

15. Which class of materials includes the widest range of elements?

16. Using data from Appendix 2, make graphs to show how the physical properties of elements change across Period 3.

a. atomic mass

b. atomic radius

c. density

d. melting point

e. boiling point

17. Using data from Appendix 2, make graphs to show how the physical properties of elements change going down Group II.

a. atomic mass

b. atomic radius

c. density

d. melting point

e. boiling point

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