states of matter - units 1, 5

Question 1

All substances are made up of?

Answer 1

Particles

Question 2

Describe particles in the SOLID state with reference to particle theory.

Give a description of the particles’ movements, inter-particular forces and spaces, and the arrangement.

Answer 2

• particles touch each other
• arranged in a regular pattern
• compact, fixed shape
• strong intermolecular force of attraction
• negligible intermolecular space
• vibrate on the spot

Question 3

Describe particles in the LIQUID state with reference to particle theory.

Give a description of the particles’ movements, inter-particular forces and spaces, and the arrangement.

Answer 3

• particles loosely touch each other
• arranged in an irregular pattern
• intermolecular force of attraction is weaker than solids but stronger than gases
• intermolecular space is more than solids but less than liquids
• particles move in and out of each other

Question 4

Describe particles in the GASEOUS state with reference to particle theory.

Give a description of the particles’ movements, inter-particular forces and spaces, and the arrangement.

Answer 4

• particles do not touch each other
• arranged in an irregular pattern
• very weak intermolecular force of attraction
• lots of intermolecular space
• particles move far apart fast and spread out in all directions