Chap.7: Particulate Nature of Matter

Question 1

Define Brownian Motion

Answer 1

The random movement of microscopic particles suspended in liquid or gas

Move constantly in different directions as they constantly bombared into particales that surround them

Question 2

Explain properties of solid ( Particulate nature of matter)

Answer 2

• Particles are very closely packed in orderly manner
• Vibrate about fixed positions
• Held together by very strong forces of attraction
• Cannot be compressed ( no space for particles to move closer)

Question 3

Explain properties of liquid ( Particulate nature of matter)

Answer 3

• Particles are closely packed in disorderly manner
• Move randomly and slide past each other
• Held by strong forces of attraction
• Have a little space to compress

Question 4

Explain properties of gases ( Particulate nature of matter)

Answer 4

• Particles are far apart and disorderly
• Moves randomly and quickly
• held by weak forces of attraction
• Lots of space in between particles

Question 5

How does melting work (Particulate nature of matter)

Answer 5

1. When heated, particles gain energy
2. Vibrates faster
   3.Gains enough energy to overcome force of attraction