Alloy

Question 1

Pure ions tend to be what?

Answer 1

Too bendy.

Question 2

What is ‘iron’ like straight from the blast furnace?

Answer 2

It is only 96%.

Other 4% is impurities - carbon.

Question 3

What is the impure ion used as?

Answer 3

Cast iron.

Question 4

What is cast iron handy for making?

Answer 4

Ornamental railings.

Not many other uses as its brittle.

Question 5

So what happens to the blast furnace iron?

Answer 5

All the impurities are removed.

Question 6

What is pure iron’s arrangement like?

Answer 6

Regular arrangement of identical atoms.

Question 7

The regular arrangement of identical atoms allows what to happen?

Answer 7

Layers of atoms slide over each other, makes the iron soft and easily shaped.
This iron is far to bendy for most uses.

Question 8

What is most iron converted into?

Answer 8

Steel - An alloy.

Question 9

How are steels formed?

Answer 9

By adding small amounts of carbon and sometimes other metals to iron.

Question 10

Name the 3 types of steel?

Answer 10

Low carbon steel - 0.1% Carbon.
High carbon steel - 1.5% Carbon.
Stainless steel.

Question 11

What is stainless steel?

Answer 11

Chromium added.

Sometimes nickel.

Question 12

Low carbon property?

Answer 12

Easily shaped.

Question 13

Low carbon use?

Answer 13

Car bodies.

Question 14

High carbon property?

Answer 14

Very hard.

Inflexible.

Question 15

High carbon use?

Answer 15

Blades for cutting tools, bridges.

Question 16

Stainless steel property?

Answer 16

Corrosion-resistant.

Question 17

Stainless steel use?

Answer 17

Cutlery.

Containers for corrosive substances.

Question 18

Alloys are harder than what?

Answer 18

Pure metals.

Question 19

Different elements have what?

Answer 19

Different sized atoms.

Question 20

So what happens when an element such as carbon is added to pure iron?

Answer 20

The smaller carbon atom will upset the layers of pure iron atoms.
Making it more difficult to slide over each other.

Question 21

What does tin + copper make?

Answer 21

Bronze.

Question 22

Copper + Nickel =

Answer 22

Cupronickel.

Question 23

Gold alloys are used to make what?

Answer 23

Jewellery.

Question 24

Aluminium alloys are used to make what?

Answer 24

Aircraft.

Question 25

What is bronze harder that?

And what is it good for making?

Answer 25

Copper.

Medals and statues.

Question 26

What is cupronickel?

Answer 26

Hard and corrosion resistant.

Silver coins.

Question 27

What metals are added to harden pure gold?

Answer 27

Zinc.
Copper.
Silver.
Palladium.
Nickel.

Question 28

In the past what was the development of alloys like?

Answer 28

Trial and error.

Question 29

What is wrong with the Eiffel Tower?

Answer 29

It is made from iron.
It goes rusty when exposed to air and water.
Painted every 7 years.