Particle Model And Part 1 Of States Of Matter

Question 1

All substances are made out of particles. What do the properties of the substance depend on?

Answer 1

It depends on what the particles are like, how they move and how they’re arranged

Question 2

Do particles have the same properties as their substances? Explain

Answer 2

No, particles can have certain properties when their altogether in a substance, but when particles are on they’re own, they won’t have those particles

Question 3

Give an example to explain how particles don’t have the same properties as their substances

Answer 3

A gold ring is yellow and solid at room temp. An individual particle won’t be solid nor yellow. It can only have those properties with other particles

Question 4

What are the three states of matter?

Answer 4

Solid, liquid and gas

Question 5

What does the state of a substance at a CERTAIN TEMPERATURE depend on?

Answer 5

How strong the force of attraction between particles of the material are

Question 6

What do how strong forces of attraction are depend on? (hint: three things)

Answer 6

– the material (structure of the substance and type of bonds holing particles together)
– the temperature
– the pressure

Question 7

When we say particles what could we be referring to? (hint: three things)

Answer 7

– molecule
– ion
– atom

Question 8

In a solid, what are the forces of attraction like and what does that mean for its arrangement?

Answer 8

Solids have strong forces of attraction between particles, which holds them close together in a fixed position so they have a very regular, lattice, organised arrangement

Question 9

Why can’t solids be compressed or changed?

Answer 9

Solid particles don’t tend to move from their positions so all solids keep a definite shape and volume

Question 10

Can solid particles move in place?

Answer 10

Yes, they can vibrate about in their positions

Question 11

What are solids like when heated?

Answer 11

The hotter a solid gets, the faster it vibrates so when heated a solid will expand slightly

Question 12

What the forces of attraction like in a liquid and how does this affect their arrangement?

Answer 12

In a liquid, there is a weaker force of attraction between particles. This means they’re randomly arranged and free to move past each other, however they tend to stay close to each other

Question 13

Why would a liquid tend to flow to fill the bottom of a container?

Answer 13

They have a definite volume ,but won’t keep a definite shape so will take the shape of what it’s placed in

Question 14

Do liquid particles move in place?

Answer 14

Yes, they’re constantly moving it’s a random motion.

Question 15

What is a liquid like when heated?

Answer 15

The hotter a liquid gets, the faster they mov. So when heated the liquid will expand

Question 16

What’s the force of attraction for gases and how does this affect its arrangement?

Answer 16

Forces of attraction in a gas is very weak so they’re free to move and are far apart. Particles in a gas will travel in straight lines though

Question 17

Gases will always fill a container. Why?

Answer 17

They have no definite volume or shape

Question 18

How do particles of gas move?

Answer 18

They move constantly in a random motion

Question 19

What are gas particles like when heated?

Answer 19

The hotter gas particles get, the faster they move. So when heated, gas will either expand or the gas pressure would increase

Question 20

Why is the particle model not that perfect?

Answer 20

Model doesn’t show the forces between particles so we don’t know how strong they are. They also show particles as spheres when really they’re ions, atoms or molecules.