C2- Bonding, Structure And Properties Of Matter

Question 1

Ion

Answer 1

An ion is a charged particle produced by the loss or gain of electrons.

Question 2

Ionic bond

Answer 2

An ionic bond is the electrostatic force of attraction between positively and negatively charged particle.

Question 3

Opposites…

Answer 3

Attract

Question 4

Sublimation

Answer 4

A change straight form a solid to a gas

Question 5

Covalent bonds…

Answer 5

Share electrons

Question 6

Ionic compound

Answer 6

A giant structure of ions held together by strong electrostatic forces in a lattice.

Question 7

Ionic compounds have…melting and boiling points

Answer 7

High…because of the large amounts of energy required to break the strong bonds.

Question 8

Metals consist of…

Answer 8

Giant structures of atoms arranged in a regular pattern (they form crystals).

Question 9

Ionic compounds can conduct electricity when…

Answer 9

When melted or dissolved in water because the ions are free to move, so charge can flow.

Question 10

Small molecules are…

Answer 10

Usually gasses or liquids that have relatively low melting and boiling points.

Question 11

Intermolecular forces increase with…

Answer 11

The size of the molecules

Question 12

Small molecules…conduct electricity

Answer 12

Don’t …because the molecules do not have an overall electric charge.

Question 13

Polymers

Answer 13

Have large molecules
Are linked to each other by strong covalent bonds

Question 14

Giant covalent structures…

Answer 14

Have very high melting and boiling points

Question 15

Ductile metals

Answer 15

Metals that can be drawn into a wire.

Question 16

Metals

Answer 16

Are good conductors of electricity because of their delocalised electrons, good conductors of thermal energy, atoms are arranged in layers so metals can be bent and shaped.

Question 17

In diamond each carbon atom forms how many bonds?

Answer 17

4

Question 18

In diamond how is carbon bonded?

Answer 18

Covalently with 4 other carbon atoms in a giant covalent structure.

Question 19

Properties of diamond

Answer 19

Very hard, high melting point, does not conduct electricity.

Question 20

How many bonds do carbon atoms form with other carbon atoms in graphite?

Answer 20

Three covalent bonds

Question 21

Graphite forms…

Answer 21

Layers of hexagonal rings

Question 22

In graphite how many electrons are delocalised

Answer 22

1

Question 23

What is graphene and when is it used?

Answer 23

It is a single layer of graphite that make it useful in electronics and composites.

Question 24

What are fullerenes?

Answer 24

Fullerenes are molecules of carbon atoms with hollow shapes e.g. buckminsterfullerene and nanotubes.

Question 25

Nano science

Answer 25

Nano science refers to structures that are 1-1000nm in size.
1nm=1 x 10*-9

Question 26

As the side of a cube decreases by a factor of 10 the SA:V ratio…

Answer 26

Increases by a factor of 10

Question 27

What are nano particles used for?

Answer 27

Medicine, electronics, cosmetics, sun creams, catalysts.