C1.1 The Particle Model

Question 1

The relative distance between particles in a solid?

Answer 1

Touching with very little space between them

Question 2

The relative distance between particles in a liquid?

Answer 2

Are still touching but with some space between them

Question 3

The relative distance between particles in a gas?

Answer 3

Are not touching and have lots of space between them

Question 4

Arrangement of particles in a solid?

Answer 4

Neat, compact, tight, next to each other

Question 5

Arrangement of particles in a liquid?

Answer 5

Quite close, randomly arranged

Question 6

Arrangement of particles in a gas?

Answer 6

Widely spaced, randomly arranged

Question 7

Movement of particles in a solid?

Answer 7

Little to no movement - only vibration

Question 8

Movement of particles in a liquid?

Answer 8

Fair amount of continuous movement

Question 9

Movement of particles in a gas?

Answer 9

Lots of movement with plenty of space

Question 10

Properties of solids?

Answer 10

Rigid, has volume, definite shape, resistant to change of shape, doesn’t flow, doesn’t expand to fill, can’t be compressed easily

Question 11

Properties of liquids?

Answer 11

No shape, fixed volume, can’t be easily compressed, can flow to take the shape

Question 12

Properties of gases?

Answer 12

No shape, no volume, easy to compress, expands, low density, occupies more space than solids & liquids

Question 13

Why do gases flow and fill their container?

Answer 13

• The particles don’t touch each
  other - has space in between
• Occupies lots of space/expands to
  fill the container

Question 14

Why do liquids take the shape of a container?

Answer 14

• The particles aren’t squeezed
  together - have space in
  between/isn’t compressed

Question 15

Why does a solid expand when heated?

Answer 15

When particles vibrate (when heated), more space is created (due to the particles gaining energy)

Question 16

Calculate the distance between atoms?

Answer 16

Ratio of: distance to diameter
= distance/diameter

Question 17

2 differences between a physical and chemical change?

Answer 17

Physical:
- change of arrangement
- easily reversible
Chemical:
- colour change
- irreversible

Question 18

Solid to liquid?

Answer 18

Melting

Question 19

Liquid to solid?

Answer 19

Solidifying

Question 20

Solid to gas?

Answer 20

Sublimation

Question 21

Gas to solid?

Answer 21

Deposition

Question 22

Gas to liquid?

Answer 22

Condensing

Question 23

Liquid to gas?

Answer 23

• Boiling
• Evaporation (below boiling point)

Question 24

Forces between particles - Strongest to weakest?

Answer 24

• Solid - strongest
  Liquid
  Gas - weakest
• Because of the distance between
  the particles

Question 25

Limitations of the particle model?

Answer 25

(Specifically)
- Forces between particles
- Size of particles
- Space between particles