Chemistry C (Giant Structures)

Question 1

Diamond is Made from

Answer 1

Carbon

Question 2

How does it bond (diamond)

Answer 2

Each carbon bonds with 4 other carbons in a covalent bond

Question 3

Melting point (diamond)

Answer 3

Very high melting point as a lot of energy is required to break the millions of strong covalent bonds in the giant structure

Question 4

Electrical conductivity (diamond)

Answer 4

Does not conduct electricity as no free electrons

Question 5

Strong and hard (diamond)

Answer 5

Millions of strong covalent bonds held together in the giant structure

Question 6

Silicon dioxide is Made from

Answer 6

SiO2 - (Silicon and Oxygen) forms the same structure and has the exact same properties as diamond

Question 7

Graphite is made from

Answer 7

Carbon

Question 8

How does graphite bond

Answer 8

Each carbon bonds with 3 other carbons in a covalent bond. The 4th electron is delocalised to form layers of carbons and layers of electrons

Question 9

Graphite melting point

Answer 9

High melting point as lots of energy needed to break the strong covalent bonds in the giant structure

Question 10

Electrical conductivity of graphite

Answer 10

Does conduct electricity as delocalised electrons are able to move and carry the electrical current

Question 11

Why is graphite Slippery

Answer 11

The layers of carbon can slide over each other

Question 12

How dose graphene bond

Answer 12

A single layer of graphite

Question 13

Graphene Melting point

Answer 13

High melting point as lots of energy needed to break the strong covalent bonds

Question 14

Electrical conductivity of graphene

Answer 14

Conducts electricity as has delocalised electrons carry the electrical current through the material

Question 15

Nanoscience
(How big)

Answer 15

1-100nm in size (a few hundred atoms)

Question 16

Nanoscience
Why do they have different properties?

Answer 16

Due to a large surface area to volume ratio

Question 17

Nanoscience
Order of particle size (largest first)

Answer 17

Nano - fine - coarse (dust)

Question 18

Nanoscience
Use

Answer 18

Medicine, electronics, cosmetics, sun creams,

Question 19

Fullerenes
How does it bond

Answer 19

Molecules of carbon atoms with hollow spaces. Made up of hexagonal rings of carbons

Question 20

Fullerenes
Buckminsterfullerene (C60)

Answer 20

The first fullerene to be discovered. A spherical sphere.

Question 21

Fullerenes
Use

Answer 21

Drug delivery

Question 22

Nanotubes
Bonding

Answer 22

Cylinderical fullerenes

Question 23

Nanotubes
Use

Answer 23

Strengthening materials (eg. Tennis rackets)

Question 24

Polymers
Bonding

Answer 24

Very large molecules of lots of small molecules joined together by covalent bonds

Question 25

Polymers state at room temperature

Answer 25

Solid at room temperature as strong intermolecular forces between the polymers

Question 26

Polymers Use

Answer 26

plastics