C2.3

Question 0

Are the melting and boiling points of simple molecular structures low or high?

Answer 0

Low

Question 1

Are the forces weak or strong in simple molecular structures?

Answer 1

Weak

Question 2

Are simple molecular structures made from non-metal or metal elements?

Answer 2

Non-metals

Question 3

What are giant ionic structures made from?

Answer 3

Ions

Question 4

Are the ions in giant ionic structures held together by strong or weak bonds?

Answer 4

Weak

Question 5

Are the melting and boiling points of giant ionic structures or salts high or low?

Answer 5

High

Question 6

Is a lot of energy needed to break the bonds in giant ionic structures?

Answer 6

Yes

Question 7

Are the ions arranged regularly or irregularly in a giant ionic structure?

Answer 7

Regularly

Question 8

Why do giant ionic structure only conduct electricity in a solution or if molten?

Answer 8

The ions are free to move.

Question 9

Give an example of a giant molecular structure

Answer 9

Diamond

Question 10

What kind of bonds are in giant molecular structures?

Answer 10

Strong covalent bonds

Question 11

Is a lot of energy needed to separate the carbon atoms in a diamond?

Answer 11

Yes

Question 12

Does diamond have a high boiling and melting point?

Answer 12

Yes

Question 13

Does diamond dissolve in water?

Answer 13

No

Question 14

Name another giant molecular structure

Answer 14

Graphite

Question 15

How are the layers of graphite held together?

Answer 15

With strong forces of attraction

Question 16

Giant metallic structures have a) negative or b) positive electrons in a sea?

Answer 16

Negative

Question 17

How do the charges on the metal ions and electrons hold the ions together?

Answer 17

There is a strong attraction between the positive metal ions and the negative electrons.

Question 18

Give three properties of thermo-setting polymers

Answer 18

Solid, hard, rigid

Question 19

Do thermo-setting polymers have cross links the hold the chains together?

Answer 19

Yes

Question 20

Do thermo-softening polymers have cross links between the chains?

Answer 20

No

Question 21

Give a property of a thermo-setting polymer and explain why it works

Answer 21

Easy to mould because the forces between the chains are easy to overcome

Question 22

How is low-density polyethene made?

Answer 22

By heating ethene at 200’c under high pressure

Question 23

Give a property of low density polyethene

Answer 23

Flexible

Question 24

Give uses of low density polyethene

Answer 24

Bags and bottles

Question 25

How is high density poly ethene made?

Answer 25

With a lower temperature and pressure in the presence of a catalyst

Question 26

Give a property of high density polyethene

Answer 26

Rigid

Question 27

Give a use of high density polyethene

Answer 27

Water tanks

Question 28

What is an alloy

Answer 28

Two metals mixed to have the best possible properties

Question 29

What are nano particles?

Answer 29

Very small particles

Question 30

What are fullerenes?

Answer 30

Molecules of carbon arranged in hexagonal rings.

Question 31

What kind of bonding is involved in carbon atoms when making carbon nanotubes?

Answer 31

Covalent

Question 32

Do nano particles have a small or large surface area to volume ratio?

Answer 32

Large