Chapter 5

Question 1

Metals are ______ when they are freshly cut or polished

Answer 1

shiny

Question 2

What does malleable mean

Answer 2

can be hammered into shape

Question 3

what does ductile mean

Answer 3

can be drawn out into wires

Question 4

what does sonorous mean

Answer 4

make a ringing sound like a bell when they are hit

Question 5

What are properties of metals

Answer 5

Metals are:

-shiny
-malleable
-ductile
-sonorous
-conduct heat energy
-magnetic
-many are solids at room temperature

Question 6

What are the properties shared by almost all non-metals

Answer 6

Non-metals looks dull
Non-metals do not reflect light very well
Non-metals surface are not as smooth as metals
Non-metals that are solids are brittle, may shatter if dropped
Non-metals do not conduct heat energy well
Non-metals are known as insulators
Non-metals, most are gases at room temperature

Question 7

What are metal mixtures called?

Answer 7

alloys

Question 8

Bronze is an alloy made by mixing which elements?

Answer 8

copper and tin

Question 9

Is bronze harder than either copper or tin?

Answer 9

Yes

Question 10

Is steel an alloy?

Answer 10

Yes

Question 11

Steel is a mixture of which elements?

Answer 11

iron and carbon

Question 12

What advantage do alloys have over original/pure metals

Answer 12

The layers of atom can’t slide over each other as easily. The alloy is alot harder and stronger than the original metal

Question 13

What are example of objects that are made with alloys?

Answer 13

Coins
Jewellery
Aeroplanes
Artificial joints
Modern Alloys

Question 14

What does a 24 carat gold mean?

Answer 14

It is a pure gold

Question 15

how many carat is a pure gold

Answer 15

24 carat

Question 16

What does 24 carat gold mean

Answer 16

24 parts out of 24 are old

Question 17

What does 18 carat gold mean

Answer 17

18 parts out of 24 of pure gold

Question 18

Is copper an element or mixture?

Answer 18

Element

Question 19

What is the Melting Point, Properties and Example uses of copper?

Answer 19

Copper has a melting point of 1085 degrees, it’s very ductile and malleable and it conducts heat and electricity well.

Example uses: electrical wiring and heating pipes

Question 20

Is Zinc an element or mixture?

Answer 20

element

Question 21

What is the Melting Point, Properties and Example uses of Zinc?

Answer 21

It’s melting point is 419.5 degrees, it is less ductile and malleable than copper, it conducts heat and electricity less well than copper

Example uses: cover iron in a thin layer to prevent it from rusting

Question 22

Is Brass an element or mixture?

Answer 22

Mixture

Question 23

What is the Melting Point, Properties and Example uses of Brass?

Answer 23

Brass has a melting point of 900-1000 degrees is less ductile than copper, more malleable than zinc and copper, it conducts heat and electricity less well than zinc

Example: musical instruments

Question 24

Which alloys are corrosion resistant?

Answer 24

Brass and Bronze

Question 25

Is tin a mixture of an element?

Answer 25

element

Question 26

What is the Melting Point, Properties and Example uses of tin?

Answer 26

Tin has a melting point of 232'C Tin is soft,ductile and malleable and conducts electricity less well than copper Tin does not corrode readily example: coating the inside of food cans

Question 27

What is the Melting Point, Properties and Example uses of Bronze?

Answer 27

Melting Point of 860-1150 less ductile than copper, hard and brittle good conductor of electricity corrosion resistant example: ship fittings, bells

Question 28

is Bronze a mixture or element?

Answer 28

mixture

Question 29

what is the use of condenser

Answer 29

To separate the mixture of two liquids

Question 30

Some acids are strong, they are _____

Answer 30

corrosive

Question 31

Dilute acids are_____ they can _____ your skin

Answer 31

harmful, irritate

Question 32

what are examples of alkalis that are in cleaning products

Answer 32

sodium hydroxide

Question 33

What happens when acids and alkalis are mixed together

Answer 33

They cancel each other out

Question 34

Can red cabbage juice be used as an indicator?

Answer 34

yes

Question 35

What type of plants can indicators be made from?

Answer 35

red cabbage, blackcurrant and beetroot

Question 36

What is a litmus?

Answer 36

Litmus is a very common indicator, it is a dye.

Question 37

What is the purpose of an universal indicator

Answer 37

universal indicator shows how acidic or alkaline a substance is

Question 38

What is the colour of strong acid

Answer 38

red

Question 39

What is the colour of weak acid

Answer 39

yellow

Question 40

What is the colour of neutral

Answer 40

green

Question 41

What is the colour of weak alkaline

Answer 41

blue

Question 42

What is the colour of strong alkaline

Answer 42

purple

Question 43

What type of scale is the strenghts of acids and alkalis measured on?

Answer 43

pH scale

Question 44

what is the number on the pH scale if the substance is acidic

Answer 44

0 to 6

Question 45

What is the number on the pH scale if the substance is alkaline

Answer 45

8 to 14

Question 46

What is the number on the pH scale if the substance is neutral

Answer 46

7