Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Chemistry EOY YR9 > EOY yr9 Chemistry > Flashcards

EOY yr9 Chemistry Flashcards

(88 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: An element can be broken down into simpler substances.

A

False

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

What is a compound?

A

A substance formed when two or more elements chemically combine.

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

Fill in the blank: The _______ is the center of an atom, containing protons and neutrons.

A

nucleus

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

What are the three subatomic particles?

A

Protons, neutrons, and electrons.

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

What charge do protons carry?

A

Positive charge

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

What charge do electrons carry?

A

Negative charge

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

What is the atomic number of an element?

A

The number of protons in its nucleus.

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

True or False: Isotopes of an element have the same number of protons but different numbers of neutrons.

A

True

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

What is a chemical bond?

A

A lasting attraction between atoms that enables the formation of chemical compounds.

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

What type of bond involves the sharing of electron pairs between atoms?

A

Covalent bond

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

What type of bond involves the transfer of electrons from one atom to another?

A

Ionic bond

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

Fill in the blank: Metals are typically ______ conductors of electricity.

A

good

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

What is an acid?

A

A substance that donates protons (H+) in a solution.

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

What is the pH range of acids?

A

0 to 7

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

What is a base?

A

A substance that accepts protons or donates hydroxide ions (OH-) in a solution.

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

What is the pH range of bases?

A

7 to 14

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

True or False: Water is considered a neutral substance.

A

True

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

What is combustion?

A

A chemical reaction that occurs when a substance reacts with oxygen to produce heat and light.

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

What are hydrocarbons?

A

Organic compounds made up of hydrogen and carbon.

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

What is the main component of natural gas?

A

Methane (CH4)

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

What is a fuel?

A

A substance that provides energy through a chemical reaction.

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

What is the process of extracting metals from their ores called?

A

Smelting

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

What is corrosion?

A

The deterioration of a metal due to a chemical reaction with its environment.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
What is the Earth's atmosphere primarily composed of?
Nitrogen (78%) and oxygen (21%)
26
What is the greenhouse effect?
The trapping of heat in the Earth's atmosphere by greenhouse gases.
27
What are the four main layers of the Earth's atmosphere?
Troposphere, stratosphere, mesosphere, and thermosphere.
28
Fill in the blank: The _______ is the layer of the atmosphere where weather occurs.
troposphere
29
What is the chemical formula for sulfuric acid?
H2SO4
30
True or False: Acids turn blue litmus paper red.
True
31
What is the process of neutralization?
The reaction between an acid and a base to produce water and a salt.
32
What is an example of a strong acid?
Hydrochloric acid (HCl)
33
What is an example of a strong base?
Sodium hydroxide (NaOH)
34
What is the law of conservation of mass?
Matter cannot be created or destroyed in a chemical reaction.
35
What is the difference between an element and a compound?
An element is a pure substance made of one type of atom, while a compound is made of two or more different types of atoms.
36
What is an alloy?
A mixture of two or more metals.
37
What is the main use of iron?
To make steel.
38
What is the periodic table?
A tabular arrangement of elements organized by increasing atomic number.
39
What does the term 'valence electrons' refer to?
Electrons in the outermost shell of an atom that are involved in chemical bonding.
40
What is a molecule?
A group of atoms bonded together.
41
What is the main product of the combustion of hydrocarbons?
Carbon dioxide (CO2) and water (H2O)
42
What is the role of a catalyst in a chemical reaction?
To speed up the reaction without being consumed.
43
What is the electron configuration of oxygen?
1s² 2s² 2p⁴
44
What is the main gas responsible for acid rain?
Sulfur dioxide (SO2)
45
True or False: Noble gases are highly reactive.
False
46
What is the process by which plants convert carbon dioxide and water into glucose and oxygen called?
Photosynthesis
47
What is the role of carbon dioxide in the Earth's atmosphere?
To trap heat and contribute to the greenhouse effect.
48
What is the chemical formula for common salt?
NaCl
49
What is an endothermic reaction?
A reaction that absorbs heat from its surroundings.
50
What is an exothermic reaction?
A reaction that releases heat into its surroundings.
51
What is the law of definite proportions?
A chemical compound contains its component elements in fixed ratio by mass.
52
What is a physical change?
A change that affects one or more physical properties of a substance without altering its chemical composition.
53
What is a chemical change?
A change that results in the formation of new chemical substances.
54
What is the significance of the atomic mass unit (amu)?
It is a standard unit of mass that quantifies mass on an atomic or molecular scale.
55
What is the difference between saturated and unsaturated hydrocarbons?
Saturated hydrocarbons have single bonds only, while unsaturated hydrocarbons contain at least one double or triple bond.
56
What is a reactant?
A substance that takes part in and undergoes change during a reaction.
57
What is a product?
A substance that is formed as a result of a chemical reaction.
58
What is the role of oxygen in combustion reactions?
Oxygen reacts with the fuel to release energy in the form of heat and light.
59
What is the formula for calculating the number of moles?
Number of moles = mass (g) / molar mass (g/mol)
60
What is molarity?
The concentration of a solution expressed as the number of moles of solute per liter of solution.
61
What is a solution?
A homogeneous mixture of two or more substances.
62
What is the difference between a solute and a solvent?
A solute is the substance being dissolved, while a solvent is the substance doing the dissolving.
63
What is the electron cloud model?
A model that depicts electrons as being located in probabilistic regions around the nucleus.
64
What is a chemical equation?
A symbolic representation of a chemical reaction showing the reactants and products.
65
What does a balanced chemical equation represent?
It represents that the number of atoms for each element is the same on both sides of the equation.
66
What is an organic compound?
A compound that contains carbon, typically bonded to hydrogen and possibly other elements.
67
What is the primary function of metals in construction?
To provide strength and durability.
68
What is the role of pH in chemistry?
It measures the acidity or alkalinity of a solution.
69
What is the main source of energy for the Earth?
The Sun
70
What are greenhouse gases?
Gases that trap heat in the atmosphere, contributing to the greenhouse effect.
71
What does the term 'oxidation' refer to?
The process of losing electrons during a chemical reaction.
72
What does the term 'reduction' refer to?
The process of gaining electrons during a chemical reaction.
73
What is the role of enzymes in chemical reactions?
To act as biological catalysts that speed up reactions.
74
What is the significance of the ozone layer?
It protects the Earth from harmful ultraviolet (UV) radiation.
75
What is the primary component of the Earth's crust?
Silicate minerals
76
What is the term for the mixture of gases that surrounds the Earth?
Atmosphere
77
What is a polymer?
A large molecule made up of repeating structural units called monomers.
78
What is the difference between renewable and non-renewable resources?
Renewable resources can be replenished naturally, while non-renewable resources are finite.
79
What is a saturated solution?
A solution that cannot dissolve any more solute at a given temperature.
80
What is the main use of aluminum?
In packaging and construction due to its lightweight and corrosion resistance.
81
What is a chemical property?
A characteristic of a substance that can only be observed during a chemical reaction.
82
What is a physical property?
A characteristic that can be observed or measured without changing the substance's identity.
83
What is the term for the energy required to break a bond between atoms?
Bond energy
84
What is the role of carbon in organic chemistry?
Carbon is the backbone of organic molecules, allowing for diverse structures.
85
What is the chemical formula for glucose?
C6H12O6
86
What is the purpose of a Bunsen burner in the lab?
To provide a controllable flame for heating substances.
87
What is the significance of the mole in chemistry?
It allows chemists to count particles by weighing them.
88
What is the effect of temperature on solubility?
Generally, solubility increases with temperature for solids.

Chemistry EOY YR9 (2 decks)

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