Chapter 25: New Materials Through Chemistry

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Alloy

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34 Terms

1

Alloy

________: a mixture of elements that has metallic properties.

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2

Metals

________ and alloys usually are good conductors of heat and electricity because of these loosely bound electrons.

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3

Fossil fuels

________ are composed primarily of carbon and hydrogen and are referred to as hydrocarbons.

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4

Ceramics

________: materials that are made from dried clay or claylike mixtures.

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5

Gold

________ is a bright, expensive metal that is soft and bends easily.

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6

Plastics

________ are usually lightweight, strong, impact resistant, waterproof, moldable, chemical resistant, and inexpensive.

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7

composition

Changing the ________ of the raw materials or the manufacturing process changes the properties of the ceramic.

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8

Ductility

________: can be pulled into wires.

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9

Synthetic

________: the polymer does not occur naturally, but it was manufactured in a laboratory or chemical plant.

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10

Conductivity

________: heat or electrical charges can move easily through the material.

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11

Malleability

________: the property that allows metals and alloys to be hammered or rolled into thin sheets.

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12

Monomer

________: one specific molecule that is repeated in the polymer chain.

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13

Polymers

________: a class of natural or manufactured substances that are composed of molecules arranged in large chains with small, simple, repeating units called monomers.

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14

Luster

________: reflect light or have a shiny appearance.

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15

overall number

If doping reduces the ________ of electrons, the semiconductor is called a p- type semiconductor.

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16

Alloys

________ can produce materials with improved properties such as greater hardness, strength, lightness, or durability.

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17

Traditional ceramics

________ also are used as insulators because they do not conduct heat or electricity.

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18

Semiconductors

________ are the materials that make computers and other electronic devices possible.

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19

Ceramics

________ can be used in the body because they are strong and resistant to body fluids, which can damage other materials.

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20

fossil fuels

Today, synthetic polymers usually are made from ________ such as oil, coal, or natural gas.

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21

Steel

________ is a strong alloy and is used often if a great deal of strength is required.

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22

Semiconductors

________: poorer conductors of electricity than metals but better conductors than nonmetals, and their electrical conductivity can be controlled.

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23

Ceramics

________ are known also for their chemical resistance to oxygen, water, acids, bases, salts, and strong solvents.

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24

Alloy

a mixture of elements that has metallic properties

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25

Luster

reflect light or have a shiny appearance

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26

Ductility

can be pulled into wires

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27

Malleability

the property that allows metals and alloys to be hammered or rolled into thin sheets

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28

Conductivity

heat or electrical charges can move easily through the material

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29

Ceramics

materials that are made from dried clay or claylike mixtures

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30

Doping

The process of adding impurities or other elements to a semiconductor to modify the conductivity

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31

Integrated Circuit

contains many semiconducting devices

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32

Polymers

a class of natural or manufactured substances that are composed of molecules arranged in large chains with small, simple, repeating units called monomers

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33

Monomer

one specific molecule that is repeated in the polymer chain

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34

Synthetic

the polymer does not occur naturally, but it was manufactured in a laboratory or chemical plant

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