Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Suleman's Year 7 EOY group > Chemistry > Flashcards

Chemistry Flashcards

(66 cards)

Start Studying
1
Q

What is the basic unit of matter?

A

Atom

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

True or False: Atoms are made up of protons, neutrons, and electrons.

A

True

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

Fill in the blank: The center of an atom is called the ______.

A

nucleus

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

What charge do protons have?

A

Positive charge

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

What is the charge of electrons?

A

Negative charge

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

Which subatomic particle has no charge?

A

Neutron

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

What is the term for a substance made of only one type of atom?

A

Element

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

True or False: A compound is made up of two or more different types of atoms chemically bonded together.

A

True

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

What is the chemical formula for water?

A

H2O

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

What do we call a mixture that is uniform throughout?

A

Homogeneous mixture

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

What is an example of a heterogeneous mixture?

A

Any clunky and uneven mixture

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

What is the process of a solid turning directly into a gas called?

A

Sublimation

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

What is the pH range of acids?

A

Less than 7

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

What is the pH range of bases?

A

Greater than 7

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

True or False: Neutral substances have a pH of 7.

A

True

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

What is the law that states matter cannot be created or destroyed?

A

Law of Conservation of Mass

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is the process of a liquid turning into a gas called?

A

Evaporation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What do we call a chemical reaction that absorbs heat?

A

Endothermic reaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What do we call a chemical reaction that releases heat?

A

Exothermic reaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Fill in the blank: The periodic table organizes elements based on their ______.

A

atomic number

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What information does the atomic number of an element provide?

A

Number of protons in the nucleus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What are vertical columns in the periodic table called?

A

Groups or families

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What are horizontal rows in the periodic table called?

A

Periods

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Which group of elements is known as the noble gases?

A

Group 18

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
True or False: Metals are typically good conductors of electricity.
True
26
What is the main characteristic of nonmetals?
They are poor conductors of heat and electricity.
27
What is the term for a chemical bond formed by the sharing of electrons?
Covalent bond
28
What is the term for a chemical bond formed by the transfer of electrons?
Ionic bond
29
Fill in the blank: A solution is made when a solute is dissolved in a ______.
solvent
30
What is the most common solvent?
Water
31
What is concentration in a solution?
The amount of solute in a given volume of solvent.
32
What do we call a change in a substance that does not change its chemical composition?
Physical change
33
What is a chemical change?
A change that results in the formation of new substances.
34
True or False: Rusting is an example of a chemical change.
True
35
What is the main purpose of a catalyst in a chemical reaction?
To speed up the reaction without being consumed.
36
What is the unit of measurement for mass in the metric system?
Gram
37
What is the unit of measurement for volume in the metric system?
Liter
38
Fill in the blank: The temperature at which a solid becomes a liquid is called the ______.
melting point
39
What is the temperature at which a liquid becomes a gas called?
Boiling point
40
What do we call the process of separating a mixture using a filter?
Filtration
41
What is chromatography used for?
To separate mixtures based on different affinities.
42
What is the main focus of chemistry?
The study of matter and its interactions.
43
What is particle theory?
Particle theory states that matter is made up of tiny particles that are in constant motion.
44
True or False: In particle theory, all particles are identical.
False: Different substances have different types of particles.
45
Fill in the blank: The three states of matter are solid, liquid, gas but is there a fourth and if so what is it .
Plasma is also counted as a state of matter
46
What happens to particles in a solid?
In a solid, particles are closely packed together and vibrate in fixed positions.
47
Which state of matter has a definite shape and volume?
Solid
48
What is the main difference between liquids and gases in terms of particle arrangement?
In liquids, particles are close together but can flow, while in gases, particles are far apart and move freely.
49
True or False: Heating a substance generally causes its particles to move faster.
True
50
What is diffusion?
Diffusion is the process where particles spread from an area of high concentration to an area of low concentration through a partially permeable membrane.
51
Multiple Choice: Which state of matter has the least energy in its particles? A) Solid B) Liquid C) Gas
A) Solid
52
What happens to the spacing of particles when a substance melts?
When a substance melts, the particles gain energy and move further apart.
53
Fill in the blank: In gases, particles move _____ and are _____ apart.
randomly; far
54
What is the term for a change from gas to liquid?
Condensation
55
True or False: The particle theory can explain why ice floats on water.
True
56
What does increasing the temperature of a gas do to its pressure (assuming volume is constant)?
Increasing the temperature increases the pressure of the gas.
57
Multiple Choice: Which of the following is NOT a state of matter? A) Plasma B) Liquid C) Vapour
C) Vapour
58
What are the symbols for each state of matter
G (gas), L (liquid), S (solid), P (plasma)
59
What is an aqueous substance.
A solid dissolved in a liquid
60
What is the name of the change from gas to solid.
Deposition
61
What are the components needed to do chromatography
Beaker, Solvent, Chromatography paper, Pencil, Inks, Stick (to hold up chromatography paper)
62
Formula for Rf
Distance of solute/ Distance of solvent.
63
Range for Rf
0 - 1
64
If there is no colour coming from the ink what does it mean
The ink cannot dissolve into the solvent
65
66
How do you tell that some inks mix to make one using only a chromatogram
Make sure that the 1 ink has the same amount of dots as the others combined and that the dots are aligned

Suleman's Year 7 EOY group (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions