C1.1.3 - Limitations of the Particle Model Flashcards Preview

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Flashcards in C1.1.3 - Limitations of the Particle Model Deck (13):
1

What are atoms?

The smallest particles that make up a substance

2

Which type of atoms are the smallest of all?

Helium atoms

3

What is the diameter of helium atoms?

62pm

4

Why is it difficult to draw particle diagrams of the gas state?

Because in reality they are so far apart

5

What are the forces between particles?

Attractive forces and electrostatic forces

6

What are attractive forces?

Electrostatic forces of attractions between positive and negative charges

7

What happens to the electrostatic forces when particles move further away from each other?

They become weaker

8

In which state is the electrostatic forces strongest?

Solid

9

In which state is the electrostatic forces weakest?

Gas

10

What are the limitations of the particle model?

The forces between particles
The size of particles
The space between particles

11

What happens to the volume of a substance when it melts?

It slightly increases

12

Why does the volume of a substance slightly increase when melting?

Some of the forces of attraction are overcome and the particles can move around each other

13

What happens to the volume of a liquid when it become a gas?

It increase greatly