Section 2 A.1- A.4

1.Classify each of the following as a chemical or a physical property:

a. Copper has a reddish brown color: Physical

b.Propane burns deadly: Chemical change

c.CO₂ fas extinguishes a candle flame: Chemical Change

d. Honey pours more slowly than does water: Physical

Classify each of the following as a chemical or a physical property:

a.Metal wire can be bent: Physical

b. Ice floats in water: Physical

c. Paper is flammable: Chemical

d. Sugar is soluble in water: Chemical

3.Classify each of the following as a chemical or physical change"

a. A candle burning: Chemical

b. An open carbonated beverage fizzes: Physical

c. Hair curls as a result of a "perm": Chemical

d. As shoes wear out, holes appear in the soles: Physical

4. Classify each of the following as a chemical or a physical property:

a. A cut apple left our ion the ai turns brown: Chemical

b.Flashlight batteries loose their charge after extended use: Chemical

c. Dry cleaning removes oil from clothing: Chemical

d. Italian dressing separates over time: Physical

For each of your answers in question 4, give evidence for your classifications as a chemical or physical change

a. A cut apple left out in in the air turns brown: Chemcial because the apple reacts with the air

b. Flashlight batteries loose their charge after extended use: Physical because it doesn't change the physical appearance of the battery

c.Dry cleaning removes oil from clothing: They dry cleaning is a chemical and when you put that chemical onto the piece of clothing it reacts and removes the oil

d. Italian dressing separates over time: the dressing isn't reacting with anything.

6. a. List the steps involved in making chocolate chip cookies from scratch.

Pour the salt, flour, baking soda, butter, brown sugar, eggs, and chocolate chips in a bowl, and mix it, then put the cookie dough in the oven, and let them bake.

b. Mixing all of the materials together is a physical property.

Baking is a chemical property

7. Classify each property as characteristic of metals of nonmetals:

a. Shiny in appearance: Metal

b. Does not react with acid: Nonmetal

c. Shatters easily: non metal

d. electrically conductive: Metal

8.Classify each of these elements as a metal, a nonmetal or a metalloid

a. tungsten: metal

b. Antimony: metal

c. Krypton:Nonmetal

d. sodium: Nonmetal

9. List the names and symbols of two elements that are metalloids

B: Boron

Si: Silocon

10. What would you expect to happen if you tapped a sample of each of the flowing elements with a hammer.

a. Iodine: Shatter

b. Zincorium: Shatter

C Phosphorus:Shatter

d.Nickel:shatter

11. LIst two properties that make a nonmetallic unsuitable for electric wiring

THey don't conduct electricity, and they don't melt 

12. What are 3 properties that meke metals suitable for use in coins

Dissolve in acid, conduct electricity, and are malleable