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Atomic Structure Problem Set

Total questions: 129

Worksheet time: 2hrs 37mins

Name
Class
Date
1.

The atomic number identifies the number of __________.

a)

electrons

b)

atoms

c)

protons

d)

neutrons

2.

The atomic number identifies the number of (a)   .

3.

Subatomic particles with a negative charge are called ____.

a)

electrons

b)

protons

c)

quarks

d)

neutrons

4.

Subatomic particles with a positive charge are called ​ (a)  

Choose from the below words
quarks
neutrons
protons
electrons
5.

How many protons are present in an atom of sulfur?

a)

32

b)

16

c)

48

d)

12

6.

Subatomic particles that are not charged are called ____.

a)

electrons

b)

positrons

c)

neutrons

d)

protons

7.

The center of an atom is called the ________________.

a)

electron cloud

b)

nucleus

c)

neutrion

d)

nuetron

8.

In a neutral atom, the number of protons is equal to the number of ____________.

a)

energy levels

b)

neutrons

c)

neurons

d)

electrons

9.

A neutral atom of germanium has an atomic number of 32 and a mass number of 73. It contains

a)

32 protons, 73 electrons, 32 neutrons

b)

32 protons, 32 electron, 64 neutrons

c)

32 protons, 32 electrons, 41 neutrons

d)

73 protons, 73 electrons, 41 neutrons

10.

An atom of krypton has 36 protons and 48 neutrons. What is its mass number?

a)

12

b)

36

c)

48

d)

84

11.

A magnesium atom consists of 12 protons, 13 neutrons and 12 electrons. What is the atomic number for magnesium?

a)

12

b)

13

c)

24

d)

37

12.

What is the approximate mass of an electron?

a)

1/12 the mass of a carbon-12 atom

b)

1 atomic mass unit (amu)

c)

1/1836 the mass of a proton

d)

approximately equal to the mass of a proton

13.

The atomic number of titanium is 22. This indicates that there are 22 ____.

a)

energy levels in the titanium atom's nucleus

b)

different isotopes of titanium

c)

neutrons in the titanium atom's nucleus

d)

protons in the nucleus of a titanium atom

14.

Isotopes are atoms of the same element that have different

a)

atomic numbers

b)

mass numbers

c)

chemical properties

d)

number of electrons

15.

Isotopes are atoms of the same element that have different

a)

numbers of protons

b)

numbers of neutrons

c)

chemical properties

d)

number of electrons

16.

Cobalt-59 has an atomic number of 27. A neutral atom of cobalt-59 contains _____ neutrons.

a)

27

b)

32

c)

59

d)

86

17.

An ion with 20 protons, 20 neutrons and a charge of +2 has ____ electrons.

a)

18

b)

20

c)

22

d)

38

e)

42

18.

A N3- ion has _____ electrons compared to a neutral N atom.

a)

three more

b)

three less

c)

the same number of

19.

Isotopes of the same element differ in ____.

a)

the number of protons in the nucleus

b)

the total number of electrons

c)

the number of neutrons in the nucleus

d)

the atomic number

20.
Which of the following could have 14 neutrons?
a)

aluminum-27

b)

silicon-29

c)

magnesium-25

d)

sodium-22

21.
An atom is electrically neutral when
a)
protons and neutrons are the same
b)
protons and electrons are the same
c)
neutrons and electrons are the same
d)
neutrons balance the protons and electrons
22.

If X is the symbol for an element, which of the following two symbols represent isotopes of the same element?

a)
b)
c)
d)
e)
23.
What is the mass number?
a)
The average atomic mass
b)
the number of protons and neutrons in the nucleus
c)
the number of protons in the nucleus
d)
the number of protons and electrons in the nucleus
24.

If aluminum loses 3 electrons, what will the charge be?

a)

+1

b)

-1

c)

+3

d)

-3

25.

An ion is:

a)

An atom that has gained or lost electrons

b)

An atom that has gained or lost neutrons

c)

An atom that has gained or lost protons

d)

An atom that is neutrally charged

26.

Which of the following nuclides contains 76 protons and 114 neutrons?

a)

Osmium-114

b)

Osmium-76

c)

Osmium-190

d)

Osmium-191

27.

 32S+2^{32}S^{+2}  contains:  

a)

15 protons, 14 electrons, 16 neutrons

b)

16 protons, 14 electrons, 16 neutrons

c)

32 protons, 2 electrons, 0 neutrons

d)

10 protons, 14 electrons, 22 neutrons

28.

Which of the following consists of 12 protons, 10 electrons, and 12 neutrons?

a)

24Mg−2^{24}Mg^{-2}

b)

24Cr+2^{24}Cr^{+2}

c)

24Cr−2^{24}Cr^{-2}

d)

24Mg+2^{24}Mg^{+2}

29.

What is the correct nuclear symbol for a species with 26 protons, 23 electrons, and 29 neutrons?

a)

55Fe−3^{55}Fe^{-3}

b)

55Fe+3^{55}Fe^{+3}

c)

49Fe−3^{49}Fe^{-3}

d)

49Fe+3^{49}Fe^{+3}

30.

Which of the following statements regarding subatomic particles is incorrect?

a)

Protons are positively charged particles and neutrons have no charge.

b)

The relative mass of the proton, electron and neutron the same.

c)

In a neutral atom the number of protons equals the number of electrons.

d)

Isotopes of an element have the same number of protons but a different number of neutrons.

31.

Iron-60 is an isotope that is often used to study meteorites.  How many neutrons does an atom of iron-60 have?

a)
26
b)
60
c)
34
d)
86
32.

How many electrons are in an atom that has an atomic number of 34, an atomic mass of 74 and a charge of -2?

a)

2

b)

34

c)

36

d)

40

33.
What is the charge of an atom that has lost one electron?
a)
-1
b)
-2
c)
+1
d)
+2
34.
What is the charge of an atom that has gained one electron?
a)
-1
b)
-2
c)
+1
d)
+2
35.

Anions are ___.

a)

ions with a positive charge

b)

ions with a negative charge

c)

electrically neutral

36.
What is the atomic number of this atom?
a)
1
b)
3
c)
4
d)
7
37.

What is the mass number of this atom?

a)

1

b)

3

c)

4

d)

7

38.

Atoms of the same element which have a different number of neutrons are called _________________.

a)

ions

b)

isotopes

c)

quarks

d)

molecules

39.

How many protons does this nuclide of titanium have?

a)
48
b)
22
c)
26
d)
70
40.

How many neutrons does this nuclide of lithium have?

(a)  

41.

How many protons does this nuclide of tungsten have?

(a)  

42.

What is the name of the pictured nuclide?

a)
Copper-29
b)
Copper-63
c)
Copper-34
d)

Copper-92

43.
How is carbon-12 different from carbon-14?
a)
They have a different number of protons
b)
they have a different number of electrons
c)
they have a different number of neutrons
44.

What is the atomic number of iron?

a)

26

b)

Fe

c)

55.845

d)

56

45.

Calcium has the atomic number 20. If a nuclide of calcium has a mass number of 46, how many neutrons are present?

a)

46

b)

20

c)

26

d)

66

46.

Calcium has the atomic number 20. If a nuclide of calcium has a mass number of 46, how many neutrons are present?

a)

46

b)

20

c)

26

d)

66

47.

Cobalt has an atomic number of 27. If a nuclide of cobalt has a mass number of 59, how many neutrons are present?

48.

What is the atomic number of Barium, Ba? (enlarge the periodic table)

a)

20

b)

38

c)

56

d)

88

49.

How many protons are in a sodium atom, Na? (tap to enlarge the periodic table)

a)

Sodium has 1 proton.

b)

Sodium has 3 protons.

c)

Sodium has 11 protons

50.

ALL atoms of the same element have:

a)

same number of protons

b)

same number of nucleons

c)

different number of neutrons

d)

different number of electrons

51.
The number of protons is equal to 
a)
the atomic number
b)
the number of neutrons
c)
the energy levels
d)
the periodic table groups
52.

If a nuclide has 12 neutrons and 11 protons, what is its mass number?

(a)  

53.

What is the charge on a lithium atom that loses 1 electron?

a)

+1

b)

0

c)

-1

d)

-2

54.

How would you write the isotope name from this nuclide symbol?

a)

Sodium-23

b)

Sodium-11

c)

Sodium-12

d)

Sodium-22

55.
What do these isotopes of carbon all have in common?
a)
neutrons & mass number
b)
atomic number and neutrons
c)
atomic number and electrons
d)
protons, atomic number, and mass number
56.

How many neutrons are in this nuclide?

a)

47

b)

61

c)

108

d)

155

57.

How many protons are in this nuclide?

a)

82

b)

125

c)

207

d)

189

58.

How many neutrons are in this nuclide?

59.

What is the name of the pictured nuclide?

a)
Chlorine-Schmorine
b)
Chlorine-17
c)
Chlorine-35
d)
Chlorine-18
60.

What nuclide is shown here?

(Red = protons, gray = neutrons, blue = electrons)

a)

Beryllium-5

b)

Beryllium-9

c)

Boron-4

d)

Boron-9

61.

These three isotopes of carbon have different -

a)

Atomic numbers

b)

Mass numbers

c)

Numbers of protons

d)

Symbols

62.

_______ are atoms with the same number of protons but varying numbers of neutrons.

a)

ions

b)

elements

c)

allotropes

d)

isotopes

63.

What is a mass number?

a)
The average atomic mass
b)
the number of protons and neutrons in the nucleus
c)
the number of protons in the nucleus
d)
the number of protons and electrons in the nucleus
64.

Determine the number of neutrons in the nuclide shown here

(a)  

65.

How many electrons are in a neutral atom of the nuclide fluorine-20?

a)

20

b)

9

c)

19

d)

18

66.

What is the name of the nuclide with 54 protons and 79 neutrons?

a)

Xenon-79

b)

Gold-79

c)

Gold-133

d)

Xenon-133

67.

What charge does an atom have when it GAINS electrons?

a)

Positive

b)

Negative

c)

Neutral

68.

What is the mass number of the nuclide shown here?

a)

35

b)

45

c)

80

d)

79.904

e)

115

69.

How many neutrons are present in the nuclide shown here?

a)

35

b)

45

c)

80

70.

How many electrons are present in this species?

a)

12

b)

10

c)

14

d)

24

e)

36

71.

What is the mass number of this nuclide?

a)

10

b)

11

c)

21

d)

20

72.

How many neutrons does this nuclide have?

a)

21

b)

11

c)

10

d)

12

73.

In order for a magnesium atom to form this species, the magnesium atom

a)

LOSES electrons

b)

It GAINS electrons

c)

GAINS protons

d)

LOSES protons

74.

What is the atomic number of this element?

a)

12

b)

24

c)

23

75.

What is the mass number of this nuclide?

a)

12

b)

24

c)

23

d)

11

76.

A neutral atom would become an ion with a charge of 2+ by 

a)
Losing two protons
b)
Losing two neutrons
c)
Losing two electrons
d)

Gaining two electrons

e)

Gaining two protos

77.
A positively charged ion is formed when
a)
A neutron is lost
b)
An electron is lost
c)
A neutron is gained
d)
An electron is gained
78.
An ion that has a negative charge is formed when an atom 
a)
Loses neutrons
b)
Loses electrons
c)
Gains neutrons
d)
Gains electrons
79.
What is the charge of an atom that has gained one electron?
a)
-1
b)
-2
c)
+1
d)
+2
80.

Which notations represent atoms that have the same number of protons but a different number of neutrons?

a)

Hydrogen-2 and Helium-3

b)

Sulfur-32 and Sulfur-32

c)

Chlorine-35 and Chlorine-37

d)

Gallium-70 and Germanium-73

81.

Two atoms that are different isotopes of the same element have

a)

the same number of protons and same number of neutrons

b)

the same number of protons but a different number of neutrons

c)

a different number of protons but the same number of neutrons

d)

a different number of protons and a different number of neutrons

82.

If an atom gains electrons, the charge will be positive.

a)

true

b)

false

83.

If an atom loses electrons, it becomes a negative ion.

a)

True

b)

False

84.

Which of the following information on the number of protons (p), electrons (e) and neutrons (n) is correct for 23892U?

a)

92 p, 92 n, 92 e

b)

92 p, 146 n, 92 e

c)

238 p, 146 n, 238 e

d)

146 p, 82 n, 92 e

85.

What is the mass number of an atom which has 11 protons, 11 electrons, and 12 neutrons?

a)

11

b)

12

c)

22

d)

23

86.

An atom with 2 protons, 3 neutrons, and 4 electrons has a charge of ____.

a)

+2

b)

-2

c)

+3

d)

0

87.

How many electrons are in an atom that has an atomic number of 34, an atomic mass of 74 and a charge of -2?

a)

2

b)

34

c)

36

d)

40

88.

Write the hyphen notation for the isotope that has 39 protons and 50 neutrons.

a)

Yttrium-11

b)

Tin-39

c)

Tin-89

d)

Yttrium-89

89.

How many neutrons does an atom of Ca-42 have?

a)

42

b)

20

c)

22

d)

36

e)

27

90.

What will be the charge of a calcium ion when a calcium atom loses its 2 electrons outermost electrons (its valence electrons) ?

a)

-2

b)

0

c)

+2

91.

The chemical species with 13 protons, 14 neutrons, and 10 electrons is ____

a)

Ne atom

b)

Al atom

c)

Al3+ ion

d)

Si4+ ion

e)

Al3- ion

92.
How many electrons are in a Li+ ion?
a)
1
b)
2
c)
3
d)
4
93.
How many electrons are in an S2- ion?
a)
10
b)
14
c)
16
d)
18
94.
How does a Br atom form a Br- ion?
a)
A bromine atom loses an electron.
b)
A bromine atom gains and electron.
c)
A bromine atom loses a proton.
d)
A bromine atom gains a proton.
95.

How many electrons are in a bromide ion, Br-?

96.

Which is the correct symbol for the chemical species with 8 protons and 10 electrons?

a)
N3-
b)
O2-
c)
O3-
d)
F-
e)

Ne2-

97.
What is the atomic number?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
98.
What is the mass number defined as?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
99.
What is the atomic number of this atom?
a)
1
b)
3
c)
4
d)
7
100.

What is the mass number of this atom?

a)

1

b)

3

c)

4

d)

7

101.

Which atom has  4 neutrons?

a)

lithium-6

b)

lithium-7

c)

lithium-8

d)
they have the same # of neutrons
102.

How many neutrons are in an atom of carbon-14?

a)
6
b)
7
c)
14
d)
8
103.
What is the mass number of this atom?
a)
2
b)
4
c)
6
d)
none of the above
104.
What is the mass number of this atom?
a)
1
b)
2
c)
3
d)
4
105.
What is the mass number of this atom?
a)
7
b)
14
c)
21
d)
none of the above
106.

An element has the mass number 12 and atomic number 6. The number of neutrons in it is:

a)

6

b)

10

c)

4

d)

8

107.

An atom of silicon has 14 protons and 15 neutrons. What is the mass number of this atom of silicon?

a)

14

b)

15

c)

29

d)

28.085

108.

A specific atom of molybdenum has an atomic number of 42 and a mass number of 96. How many protons are in this atom of molybdenum?

a)

21

b)

54

c)

42

d)

96

109.

True or false: The mass number is the number of protons + the number of neutrons.

a)

True

b)

False

110.

A sodium atom has 11 protons. It has a mass number of 23. How many neutrons does it have?

a)

11

b)

23

c)

12

d)

5

111.

A beryllium atom has 4 protons. It has a mass number of 9. How many neutrons does it have?

a)

5

b)

4

c)

9

d)

8

112.

A beryllium atom with 4 protons and a mass number of 9 has 5 neutrons.

a)

True

b)

False

113.

A mercury atom has 80 protons. It has a mass number of 201. How many neutrons does it have?

a)

201

b)

121

c)

80

d)

281

114.

A mercury atom has 80 protons. It has a mass number of 201. It has (a)   neutrons.

115.

A calcium atom has 20 protons. It has a mass number of 40. How many neutrons does it have?

(a)  

116.

The atomic number of nitrogen is 7. Its mass number is 14. How many neutrons does it have?

a)

7

b)

48

c)

14

d)

4

117.

If an element has 17 protons and 20 neutrons, what is its mass number?

a)

17

b)

10

c)

20

d)

37

118.

The mass number of an element with 17 protons and 20 neutrons is 37.

a)

True

b)

False

119.

If an element has 10 protons and 12 neutrons, what is its mass number?

(a)  

120.

A magnesium ion consists of 12 protons, 13 neutrons and 10 electrons. What is the charge of this ion?

a)

+2

b)

-2

c)

+3

d)

-3

e)

+1

121.

A chromium ion consists of 24 protons, 28 neutrons and 21 electrons. What is the charge of this ion?

a)

+2

b)

-2

c)

+3

d)

-3

e)

+1

122.

Iron-60 is an isotope that is often used to study meteorites.  How many neutrons does iron-60 have?

a)
26
b)
60
c)
34
d)
86
123.

How many neutrons does this nuclide of tungsten have?

(a)  

124.

What is the mass number of the the nuclide shown here?

(a)  

125.

Which of the following information on the number of protons (p), electrons (e) and neutrons (n) is correct for 23892U?

a)

92 p, 92 n, 92 e

b)

92 p, 146 n, 92 e

c)

238 p, 146 n, 238 e

d)

146 p, 82 n, 92 e

126.

Which of the following information on the number of protons (p), electrons (e) and neutrons (n) is correct for 55Mn+2?

a)

25 p, 55 n, 27 e

b)

25 p, 30 n, 23 e

c)

55 p, 25 n, 25 e

d)

80 p, 30 n, 78 e

e)

27 p, 30 n, 25 e

127.

The ion 55Mn+2 contains ​ (a)   protons, ​ (b)   neutrons, and ​ (c)   electrons.

Choose from the below words
25
30
23
26
27
28
29
24
22
128.

How many electrons does this ion of tungsten have?

(a)  

129.

How many electrons does this ion of arsenic have?

(a)  

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