Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Science > Chemistry chapter 3 > Flashcards

Chemistry chapter 3 Flashcards

1
Q

What is a physical change

A

No new substances are made
Atoms and molecules within do not change
Are easily reversible

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is a chemical change

A

New substances are made
Are difficult to reverse

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Name 3 things that increase the rate of diffusion

A

Temperature
Concentration
Particle size

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is thermal expansion

A

When particles in a solid or liquid gain enough energy to occupy more space

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is concentration

A

The number of particles packed in a certain volume

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is pressure

A

The average force on a certain area

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is density

A

The amount of mass per unit volume of a substance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the formula for density

A

DENSITY=mass/volume

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Why is ice less dense than water

A

As it is arranged in a regular lattice and have gaps in between

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the structure of metals

A

A lattice of positive ions
A sea of delocalised electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Why do metals conduct electricity

A

Because they have a sea of delicalised electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Why are alloys stronger than metals

A

Alloys are stronger because the Atoms are different sizes which makes the layers distorted

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Name 3 General properties of solids

A

Cannot be compressed
Fixed shape
Fixed volume

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Name 3 General properties of liquids

A

Compressible
Fixed volume
No fixed shape
Particles can slide over each other

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Name 3 General properties of gasses

A

Particles move randomly
Lots of space between them
Invisible to the eye

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Why does adding salt to water make it more dense

A

Because there is more mass in the same volume

17
Q

What is viscosity

A

The ability to flow

18
Q

What is compression

A

The ability to be squashed or pushed together there is more space between particles so they can be compressed

19
Q

What is solubility

A

The ability to dissolve

20
Q

Name some properties of metals

A

High melting point
Hard
Strong
Malleable
Ductile
Conductors

21
Q

Who invented brownian motion

A

Robert brown

22
Q

What is brownian motion

A

The random movement of particles in a fluid

23
Q

What is latent heat

A

The heat required to change state without an increase of temperature

24
Q

What is the state change from solid to gass called

A

Sublimation

25
Q

What is the state change from gas to solid called

A

Deposition

26
Q

What is melting point

A

The temperature a substance melts at

27
Q

What Is freezing point

A

The temperature a substance freezes at

28
Q

What is boiling point

A

The temperature a substance evapourates at

29
Q

What does the temperature depend on

A

The intermolecular forces

30
Q

What state has the least intermolecular forces

A

Gases

31
Q

What state has the least internal energy

A

Solids

32
Q

What state has the most intermolecular forces

A

Solids

33
Q

What state has the most internal energy

A

Gases

34
Q

What does the law of conservation of mass

A

Matter cannot be lost or gained only transformed

Science (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions