Quiz 3 Classification of Materials

Question 1

Metals

Answer 1

shiny, good conductors, usually can be melted, can be shaped

Question 2

alloy

Answer 2

mixture of two or more metals (sometimes nonmetals)

Question 3

ceramics

Answer 3

inorganic, nonmetallic; often compound of metal and something else (silica-based in dentistry); minerals are ceramics too

Question 4

mer

Answer 4

simplest repeating chemical structural unit from which the polymer is composed

Question 5

dentures material

Answer 5

composite

Question 6

polymer

Answer 6

long chain organic molecule

Question 7

applications of polymers (rubbers/plastic type)

Answer 7

dentures, sealants, bonding agents

Question 8

crowns, veneers made of

Answer 8

can be ceramics

Question 9

composites

Answer 9

a mixture of two different classes of material

Question 10

dental composites/resin composites

Answer 10

mix of polymer (resin) and ceramic (glass particles know as fillers)

Question 11

Bonding of metal

Answer 11

metallic

Question 12

bonding of ceramics

Answer 12

ionic/covalent

Question 13

bonding of polymers

Answer 13

covalent w/ in chains and secondary (between chains)

Question 14

structure of metals

Answer 14

crystalline

Question 15

structure of ceramics

Answer 15

amorphous, crystalline, or combination

Question 16

structures of polymers

Answer 16

chains, primarily amorphous (some crystalline)

Question 17

quartz

Answer 17

crystalline ceramic

Question 18

Glass

Answer 18

amorphous ceramic

Question 19

polymer arrangements

Answer 19

amorphous, no long range order

Question 20

hardness

Answer 20

ceramic > metal > polymer

Question 21

elastic

Answer 21

Ceramic > metal > polymer

Question 22

Temp strength comparison

Answer 22

Ceramic > metal > polymer

Question 23

comparison of brittle and toughness

Answer 23

ceramic is brittle, then polymers, and metals most tough

Question 24

does not deform before it breaks

Answer 24

brittle