Chemistry Revision

Question 1

Solids. Shape

Answer 1

Fixed Shape

Question 2

Solids. Compressibility.

Answer 2

Cant be compressed

Question 3

Solids. Volume

Answer 3

Fixed volume

Question 4

Solids. Ability to flow

Answer 4

Dont flow

Question 5

Liquids. Shape

Answer 5

Mathc the shape of their container from the bottom up

Question 6

Liquids. Compressibility

Answer 6

Cant be compressed significantly.

Question 7

Liquids. Volume

Answer 7

Fixed volume

Question 8

Liquids. Ability to flow

Answer 8

Flow easily

Question 9

Gases. Shape

Answer 9

Spread out to match the shape of their whole container

Question 10

Gases. Compressibility.

Answer 10

Can be compressed

Question 11

Gases. Volume

Answer 11

Match the volume of their containers

Question 12

Gases. Ability to flow

Answer 12

Diffuse( spread out until equally distributed throughout a container).

Question 13

Solid -> gas is

Answer 13

Subliming

Question 14

Solid -> liquid is

Answer 14

Melting

Question 15

Liquid to gas is

Answer 15

Boiling

Question 16

Gas to liquid is

Answer 16

Condensing

Question 17

Liquid to solid is

Answer 17

Freezing

Question 18

State the three points of the particle model.

Answer 18

1. All matter is made up of tiny particles.
2. These particles can be represented by small, solid spheres.
3. The three states of matter have different arrangements of their particles

Question 19

briefly explain the model’s limitations

Answer 19

Limitation:
• Particles have forces of attraction between them that cannot be shown using this model
• Particles can be different shapes depending on the substance
• Particles are not solid – in fact much of the particles themselves are empty space!

Question 20

Finish this. Explain the properties of solids, liquids and gases by referencing the particle model
Solids
The particles of a substance in the solid state are held close together in fixed positions in a ……………… arrangement. The particles …………… but cannot move.
This means that solids keep a definite …………… and volume.
Solids cannot ………………
Solids also cannot be squashed as there is very little ……………… between the particles

Answer 20

he particles of a substance in the solid state are held close together in fixed positions in a regular arrangement. The particles vibrate but cannot move. This means that solids keep a definite shape and volume. Solids cannot flow. Solids also cannot be squashed as there is very little space between the particles.

Question 21

Finish this. The particles of a substance in the liquid state are close together but ………… freely past each other. The particles are ………………. moving.
This means that liquids do not have a …………… shape and can flow.
Liquids fill the ……………. of a container.
Liquids keep the same ………….
Liquids cannot be squashed easily as there is little ……………. between the particles.

Answer 21

The particles of a substance in the liquid state are close together but move freely past each other. The particles are constantly moving. This means that liquids do not have a fixed shape and can flow. Liquids fill the bottom of a container. Liquids keep the same volume. Liquids cannot be squashed easily as there is little space between the particles.

Question 22

Finish this. The particles of a substance in the gas state are far apart and free to move ………………… and ………………… in all directions. This means that gases do not have a definite …………….
Gases fill a ………… container.
Gases can be easily squashed as there are ……………… spaces between the particles.

Answer 22

The particles of a substance in the gas state are far apart and free to move quickly and freely in all directions. This means that gases do not have a definite shape. Gases fill a whole container. Gases can be easily squashed as there are large spaces between the particles.

Question 23

Motion of particles in solid:

Answer 23

Particles only vibrate around a fixed point, they cannot move.

Question 24

Motion of particles in liquid:

Answer 24

Particles can flow over each other but still remain close together.

Question 25

Motion of particles in gas:

Answer 25

Particles can move freely in the container.