The Particulate Nature of Matter

Question 1

What are the 4 properties of solids

Answer 1

• They have a definite mass and shape
• They are rigid
• They are almost incompressible
• They have a greater density than liquids or gases

Question 2

What are the 4 properties of liquids

Answer 2

• They are almost incompressible
• Have a fixed volume but no shape
• They can flow
• Boiling points above room temperature

Question 3

What are the properties of gases

Answer 3

• Compressibility
• Expansibility
• Ability to diffuse
• Low density

Question 4

Describe the structure of solids, liquids and gases

Answer 4

Solids - closely packed, restricted movement
Liquids - mare spaced out, free movement, frequently collide
Gases - largely spaced out, sometimes collide, free movement

Question 5

What is the kinetic particle theory

Answer 5

All matter is made up of many small particles that are constantly in a state of random motion

Question 6

Define diffusion

Answer 6

Diffusion is the net movement of particles from an area of higher concentration to an area of lower concentration

Question 7

Describe the rate of diffusion on molecular mass

Answer 7

The closer the distribution of the material gets to equilibrium, the slower the rate of diffusion becomes. Mass of the molecules diffusing: heavier molecules move more slowly; therefore, they diffuse more slowly. The reverse is for lighter molecules

Question 8

What is a homogenous compound

Answer 8

It is a compound belonging to a series of compounds

Question 9

What is a heterogenus compound

Answer 9

A compound consisting of different compounds e.g. air