Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

9th Chemistry > Structure Of An Atom > Flashcards

Structure Of An Atom Flashcards

(92 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 can be divided into smaller particles.

A

True

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

What are the three main subatomic particles?

A

Protons, neutrons, and electrons

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

Fill in the blank: The nucleus of an atom contains ______ and ______.

A

protons and neutrons

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

What is the charge of a proton?

A

Positive

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

What is the charge of an electron?

A

Negative

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

What is the mass of a neutron compared to a proton?

A

Approximately equal

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

True or False: Electrons are found in the nucleus of an atom.

A

False

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

What determines the identity 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
10
Q

What is the atomic number of an element?

A

The number of protons in the nucleus

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

Fill in the blank: The sum of protons and neutrons in an atom is called its ______.

A

mass number

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

What is an isotope?

A

Atoms of the same element with different numbers of neutrons

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

True or False: Isotopes of an element have different chemical properties.

A

False

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

What is the main difference between the Bohr model and the Rutherford model of the atom?

A

The Bohr model includes quantized energy levels for electrons.

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

What are energy levels in an atom?

A

Regions where electrons are likely to be found

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

What is an electron cloud?

A

The area around the nucleus where electrons are likely to be found

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

What is the maximum number of electrons that can occupy the first energy level?

A

2

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

What is the maximum number of electrons that can occupy the second energy level?

A

8

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

True or False: The outermost electrons are referred to as valence electrons.

A

True

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

What is the significance of valence electrons?

A

They determine an atom’s chemical properties and bonding behavior.

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

What is the symbol for the element Carbon?

A

C

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

What is the atomic mass of Carbon?

A

Approximately 12 atomic mass units (amu)

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

Fill in the blank: The ______ model describes the atom as a small, positively charged nucleus surrounded by electrons.

A

Rutherford

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

What is the principle of quantization in the Bohr model?

A

Electrons exist in specific energy levels and can transition between them.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
What is the term for an atom that has gained or lost electrons?
Ion
26
What is a cation?
A positively charged ion
27
What is an anion?
A negatively charged ion
28
True or False: The atomic mass is the average mass of all isotopes of an element.
True
29
What is the significance of the periodic table?
It organizes elements based on increasing atomic number and similar properties.
30
Fill in the blank: The ______ is the region of space around the nucleus where electrons are likely to be found.
electron cloud
31
What is the relationship between atomic number and chemical behavior?
The atomic number determines the element's identity and its chemical behavior.
32
What is the main concept of Dalton's atomic theory?
All matter is made up of indivisible atoms.
33
True or False: Atoms of different elements can combine in simple whole-number ratios to form compounds.
True
34
What does the term 'atomic mass unit' (amu) refer to?
A unit of mass used to express atomic and molecular weights.
35
What is the electron configuration for Oxygen (O)?
1s² 2s² 2p⁴
36
What is the valency of an element?
The combining capacity of an element, based on the number of electrons it can gain, lose, or share.
37
What is the difference between a molecule and a compound?
A molecule can be made of the same or different elements, while a compound is made of different elements.
38
Fill in the blank: The ______ is the central part of an atom that contains protons and neutrons.
nucleus
39
What is the significance of the neutron in an atom?
Neutrons contribute to the mass of the atom and help stabilize the nucleus.
40
True or False: Electrons have a much greater mass than protons.
False
41
What defines a chemical reaction at the atomic level?
The rearrangement of atoms to form new substances.
42
What is the Heisenberg Uncertainty Principle?
It states that the position and momentum of an electron cannot both be precisely determined at the same time.
43
What is a photon?
A quantum of light or electromagnetic radiation.
44
Fill in the blank: The ______ principle states that no two electrons in an atom can have the same set of quantum numbers.
Pauli exclusion
45
What is the shape of an s orbital?
Spherical
46
What is the shape of a p orbital?
Dumbbell-shaped
47
What is the basic unit of matter?
Atom
48
True or False: Atoms can be divided into smaller particles.
True
49
What are the three main subatomic particles?
Protons, neutrons, and electrons
50
Fill in the blank: The nucleus of an atom contains ______ and ______.
protons and neutrons
51
What is the charge of a proton?
Positive
52
What is the charge of an electron?
Negative
53
What is the mass of a neutron compared to a proton?
Approximately equal
54
True or False: Electrons are found in the nucleus of an atom.
False
55
What determines the identity of an element?
The number of protons in its nucleus
56
What is the atomic number of an element?
The number of protons in the nucleus
57
Fill in the blank: The sum of protons and neutrons in an atom is called its ______.
mass number
58
What is an isotope?
Atoms of the same element with different numbers of neutrons
59
True or False: Isotopes of an element have different chemical properties.
False
60
What is the main difference between the Bohr model and the Rutherford model of the atom?
The Bohr model includes quantized energy levels for electrons.
61
What are energy levels in an atom?
Regions where electrons are likely to be found
62
What is an electron cloud?
The area around the nucleus where electrons are likely to be found
63
What is the maximum number of electrons that can occupy the first energy level?
2
64
What is the maximum number of electrons that can occupy the second energy level?
8
65
True or False: The outermost electrons are referred to as valence electrons.
True
66
What is the significance of valence electrons?
They determine an atom's chemical properties and bonding behavior.
67
What is the symbol for the element Carbon?
C
68
What is the atomic mass of Carbon?
Approximately 12 atomic mass units (amu)
69
Fill in the blank: The ______ model describes the atom as a small, positively charged nucleus surrounded by electrons.
Rutherford
70
What is the principle of quantization in the Bohr model?
Electrons exist in specific energy levels and can transition between them.
71
What is the term for an atom that has gained or lost electrons?
Ion
72
What is a cation?
A positively charged ion
73
What is an anion?
A negatively charged ion
74
True or False: The atomic mass is the average mass of all isotopes of an element.
True
75
What is the significance of the periodic table?
It organizes elements based on increasing atomic number and similar properties.
76
Fill in the blank: The ______ is the region of space around the nucleus where electrons are likely to be found.
electron cloud
77
What is the relationship between atomic number and chemical behavior?
The atomic number determines the element's identity and its chemical behavior.
78
What is the main concept of Dalton's atomic theory?
All matter is made up of indivisible atoms.
79
True or False: Atoms of different elements can combine in simple whole-number ratios to form compounds.
True
80
What does the term 'atomic mass unit' (amu) refer to?
A unit of mass used to express atomic and molecular weights.
81
What is the electron configuration for Oxygen (O)?
1s² 2s² 2p⁴
82
What is the valency of an element?
The combining capacity of an element, based on the number of electrons it can gain, lose, or share.
83
What is the difference between a molecule and a compound?
A molecule can be made of the same or different elements, while a compound is made of different elements.
84
Fill in the blank: The ______ is the central part of an atom that contains protons and neutrons.
nucleus
85
What is the significance of the neutron in an atom?
Neutrons contribute to the mass of the atom and help stabilize the nucleus.
86
True or False: Electrons have a much greater mass than protons.
False
87
What defines a chemical reaction at the atomic level?
The rearrangement of atoms to form new substances.
88
What is the Heisenberg Uncertainty Principle?
It states that the position and momentum of an electron cannot both be precisely determined at the same time.
89
What is a photon?
A quantum of light or electromagnetic radiation.
90
Fill in the blank: The ______ principle states that no two electrons in an atom can have the same set of quantum numbers.
Pauli exclusion
91
What is the shape of an s orbital?
Spherical
92
What is the shape of a p orbital?
Dumbbell-shaped

9th Chemistry (2 decks)

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