unit 2 test

Question 1

Important factors when choosing materials to make a product.

Answer 1

Durability, safety, breakage, cost, mold ability, waste production, hazards to environment , effect on taste

Question 2

What is the life cycle of a product?

Answer 2

Raw materials, manufacturing, useful life (product is drank), End of life (recycled or dumped)

Question 3

What are glass made from?

Answer 3

sand, limestone, and soda ash

Question 4

What are aluminum made from?

Answer 4

bauxite

Question 5

What are plastic from?

Answer 5

Oil (hydrocarbons)

Question 6

What are chemical properties of substances?

Answer 6

Color change, reactivity to copper chloride, hydrochloric acid, water, and density compared to water and ethanol, flammability, corrasion,

Question 7

What are physical properties of substances?

Answer 7

Electro conductivity, luster, scratch test, color (describbation), flexibility, transparentency (transparent, translucent & opaque)

Question 8

What stage are elements at room temperature?

Answer 8

Solid, because ⅔ are metal

Question 9

Alkali metals–

Answer 9

+1 first group

Question 10

Alkaline earth metals

Answer 10

+2 second group

Question 11

Other metals–

Answer 11

Columns 13-15

Question 12

metalloids

Answer 12

stair step line in columns 13-17 expect Al

Question 13

Hydrogen Family

Answer 13

+1 group 1

Question 14

Carbon Family

Answer 14

+-4 group 14

Question 15

Nitrogen Family

Answer 15

-3 group 15

Question 16

Oxygen Family–

Answer 16

-2 group 16

Question 17

Halogens–

Answer 17

-1 group 17

Question 18

Noble Gasses

Answer 18

group 18, 0 charge

Question 19

How many elements are in an example of a molecule?
For example
CO2–
NH3-
C6H12O6–

Answer 19

CO2– 3
NH3–4
C6H12O6–24

Question 20

What is an atom?-

Answer 20

smallest unit of an element