C1.1

Question 1

What are particles?

Answer 1

Tiny bits of matter

Question 2

What is the movement, arrangement and distance of solid particles?

Answer 2

Vibrate in fixed positions
Regular
Very close

Question 3

What is the movement, arrangement and distance of liquid particles?

Answer 3

Move around each other
Random
Close

Question 4

What is the movement, arrangement and distance of gas particles?

Answer 4

Quickly in all directions
Random
Far

Question 5

Why can you compress gases but not solids?

Answer 5

Gas particles have space to move into, but solid particles dont

Question 6

What is an advantage and disadvantage of 3D diagrams for particles

Answer 6

You can see depth as well unlike 2D, but it also means you can only see parts of the particles

Question 7

What is a physical change?

Answer 7

When particles in a substance move around,rearrange but still stay the same so no new products are made

Question 8

What is a chemical change?

Answer 8

When particles break and join in different ways, for example new bonds being formed, and a new substance is made

Question 9

How big are helium atoms?

Answer 9

62pm (6.2 x10^-11 m)

Question 10

How do you work out the distance to diameter ratio?

Answer 10

Distance between atoms over diameter of atom

Question 11

What are the 3 main limitations of the particle model?

Answer 11

It has inaccurate size of particles
Inaccurate distance and space between particles
Doesn’t take into account forces between particles