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Atom Structure

Total questions: 90

Worksheet time: 2hrs 29mins

Name
Class
Date
1.

Molybdenum has an atomic number of 42. This means that molybdenum –

a)

has a freezing point of 42° Fahrenheit.

b)

belongs to Group 42 on the Periodic Table.

c)

can form 42 bonds with other atoms.

d)

contains 42 protons in its nucleus.

2.

Which of the following properties of carbon distinguishes it from all other elements?

a)

Carbon has six protons in its nucleus.

b)

Carbon is a gray solid at room temperature.

c)

Carbon forms compounds with oxygen

d)

Carbon can be found in Earth’s crust.

3.

What is the name for the type of subatomic particle that is electrically neutral and found in the nucleus of an atom?

a)

Proton

b)

Neutron

c)

Ion

d)

Electron

4.

Which particles would you find in the nucleus of an atom?

a)

Protons and neutrons

b)

Electrons and protons

c)

Electrons only

d)

Neutrons and electrons

5.

Which subatomic particle(s) would be found orbiting around the nucleus?

a)

Electrons and protons

b)

Neutrons only

c)

Protons and neutrons

d)

Electrons only

6.

Which of the following correctly lists the pair of subatomic particles that balance the charge of the atom?

a)

Protons and neutrons

b)

Electrons and neutrons

c)

Protons and electrons

d)

Electrons and ions

7.

What is the mass of an atom with seven protons, seven neutrons, and eight electrons?

a)

15

b)

14

c)

13

d)

22

8.

What is the arrow pointing to?

a)

atomic number

b)

atomic mass

c)

chemical formula

d)

valence shell

9.

The nucleus of the atom contains 8 protons and 9 neutrons. The atom is electrically neutral. How many electrons does this atom have?

a)

4

b)

9

c)

8

d)

15

10.

If an atom has 17 protons, 18 neutrons, and 17 electrons, what is the mass of this atom?

a)

17

b)

18

c)

35

d)

52

11.

Which of the following lists the two subatomic particles that contribute the most to the mass of an atom?

a)

Protons and electrons

b)

Protons and neutrons

c)

Neutrons and electrons

d)

Electrons and ions

12.

What subatomic particle identify an element ?

a)

electrons

b)

protons

c)

neutrons

d)

ions

13.

Name this element.

a)

Argon

b)

Chlorine

c)

Aluminum

d)

Boron

14.

What is this element?

a)

Beryllium (atomic #4)

b)

Boron (atomic #5)

c)

Carbon (atomic #6)

d)

Nitrogen (atomic #7)

15.

How many protons does lithium have ?

a)

7

b)

6

c)

3

d)

9

16.

How many neutrons does Oxygen - 16 have?

a)

8

b)

16

c)

15

d)

7

17.

How many of electrons fill the 1st energy level of an atom?

a)

2

b)

4

c)

8

d)

18

18.

How many electrons fill the 2nd energy level of an atom?

a)

2

b)

6

c)

8

d)

18

19.

Which of the following correctly represents the electrical charges of the subatomic particles in the above graphic?

a)

I - negative charge, II – positive charge, III – no charge

b)

I - positive charge, II – negative charge, III – no charge

c)

I - no charge, II – positive charge, III – negative charge

d)

I - no charge, II – negative charge, III – positive charge

20.

An atom of a certain element is solid at room temperature, very stable, conducts electricity, and is magnetic. This atom has an atomic number of 26 and a mass number of 56. 

How many neutrons are in this atom?

a)

26

b)

30

c)

56

d)

82

21.

Which of the following is the atomic number of the atom represented in the graphic?

a)

16

b)

17

c)

18

d)

33

22.

When determining an element's identity, what is the most important subatomic particle to examine?

a)

protons

b)

neutrons

c)

electrons

d)

atomic mass

23.

An atom has 11 protons, 12 neutrons, and 11 electrons. What is the identity of the element?

a)

Magnesium

b)

Vanadium

c)

Sodium

d)

Titanium

24.

The atoms of a certain element each contain 18 protons and 8 valence electrons.


What is the element's name?

a)

Argon

b)

Krypton

c)

Neon

d)

Sodium

25.

An atom of a certain element has 53 protons, 53 electrons and a mass number of 127.


How many neutrons are in this atom?

a)

64

b)

74

c)

106

d)

180

26.

Which of the following is the best description of an atom?

a)

A core of protons surrounded by electrons

b)

Protons and neutrons grouped in loose arrangements

c)

A core of protons and neutrons surrounded by electrons

d)

Protons, neutrons, and electrons grouped in a solid core

27.

A neutral atom is an atom with the same number of:

a)

electrons and neutrons

b)

protons and neutrons

c)

protons and electrons

d)

electrons and valence electrons

28.

Nitrogen has a mass of 14 AMU and 7 protons. How many neutrons does nitrogen have?

a)

21

b)

14

c)

7

d)

8

29.
 What is the mass number of this element?
a)
5
b)
27
c)
32
d)
59
30.
What is the atomic number?
a)
number of protons
b)
number of neutrons
31.
A particle that moves around the nucleus is a(n)...
a)
Proton
b)
Neutron
c)
Electron
d)
Quark
32.
What number indicates the nucleus?
a)
1
b)
2
c)
3
d)
4
33.
What number indicates a proton?
a)
1
b)
2
c)
3
d)
4
34.
What number indicates an electron?
a)
1
b)
2
c)
3
d)
4
35.

What is the name of this atom? (Count the number of protons)

a)

Lithium (Li)

b)

Cesium (Cs)

c)

Potassium (K)

d)

Helium (He)

36.

How many protons are in this atom?

a)

1

b)

2

c)

3

d)

4

37.

Which of the following is MOST reactive?

a)

Lithium

b)

Lead

c)

Tin

d)

Copper

38.

Which of the following is MOST reactive?

a)

Lithium

b)

Lead

c)

Tin

d)

Copper

39.

Which metal is more reactive than calcium?

a)

magnesium

b)

potassium

c)

silver

d)

aluminum

40.
Which two groups on the Periodic Table are the MOST reactive?
a)
Group 1 and Group 17
b)
Group 2 and Group 16
c)
Group 13 and Group 15
d)
Group 17 and Group 18
41.
How many valence electrons are elements trying to reach in their outer shells?
a)
1
b)
2
c)
5
d)
8
42.
What determines the reactivity of an element?
a)
Size of its nucleus
b)
Number of total electrons
c)
Number of valence electrons
d)
Number of shells
43.
How do you determine the number of valence electrons an element has?
a)
Look at its period
b)
Look at its group
c)
Look at its atomic number
d)
Look at its atomic mass
44.

What are valence electrons?

a)

The total number of electrons in an atom

b)

The number of electrons in the outermost shell

c)

The number of electrons in the second shell

d)

The number of protons in the outermost shell

45.

Which elements have the most similar chemical properties?

a)

boron and carbon

b)

oxygen and sulfur

c)

aluminum and bromine

d)

argon and silicon

46.

 

What element contains 7 protons and 5 valence electrons?

a)

Boron

b)

Vanadium

c)

Nitrogen

d)

Lithium

47.

A student is shown a picture of the atom to the side. What element, based on the subatomic particles in the atom, is shown?

a)

Beryllium

b)

Lithium

c)

Helium

d)

Oxygen

48.

The atomic number of an element is equal to its number of protons. Therefore, a logical conclusion is that the number of protons determines an element’s-

a)

Mass and atomic weight.

b)

The number of stable isotopes.

c)

Identity

d)

State of matter

49.

Compare the data shown in the table. What reasonable conclusion can be made from the information given?

a)

Element 1 has the same atomic mass as Element 4

b)

Element 3 has a very similar chemical properties as Element 4

c)

Element 1 has very similar chemical properties as Element 3

d)

None of the above

50.

Tin, Sn, is a soft white metal. It has a low melting point compared with other metals. Tin is widely used as a coating for cans of food. Which statement accurately describes atoms of tin?

a)

Tin atoms have 50 protons.

b)

Tin atoms have five valence electrons.

c)

Tin atoms have 119 neutrons.

d)

Tin atoms have 68 electrons.

51.

The atoms of a certain element each contain 11 protons and 1 valence electron. Which statement correctly identifies this element and describes its chemical reactivity?

a)

The element is fluorine, and it is not very reactive.

b)

The element is sodium, and it is not very reactive.

c)

The element is sodium, and it is highly reactive.

d)

The element is fluorine, and it is highly reactive.

52.

Students were asked to identify the location of elements in the periodic table based on clues printed on game cards.

Based on the data, which periodic table shows the correct location of the four elements?

a)
b)
c)
d)
53.
How many valence electrons are found in atoms of group 14?
a)
4
b)
3
c)
14
d)
16
54.
Which group has the greatest number of valence electrons?
a)
1
b)
14
c)
18
d)
16
55.
How many valence electrons are found in atoms of group 15?
a)
4
b)
5
c)
2
d)
3
56.
How many valence electrons are found in atoms of group 1?
a)
7
b)
6
c)
4
d)
1
57.

What are valence electrons?

a)

The total number of electrons in an atom

b)

The number of electrons in the outermost shell

c)

The number of electrons in the second shell

d)

The number of protons in the outermost shell

58.

Which elements have the most similar chemical properties?

a)

boron and carbon

b)

oxygen and sulfur

c)

aluminum and bromine

d)

argon and silicon

59.

All atoms are most stable with (or would "prefer") how many electrons in their valence shell?

a)

1

b)

2

c)

8

d)

18

60.
Valence electrons are: 
a)
Electrons farthest away from the nucleus
b)
Electrons closest to the nucleus
c)
Electrons that just come and go - they don't stay with the atom
d)
Electrons in the second shell
61.

When trying to identify an unknown element, a scientist determines what other elements reacts with chemically. Which property of the unknown element determines the other element it reacts with?

a)

The total number of neutrons in the unknown element

b)

The total number of particles in the nucleus of the unknown element

c)

The number of protons in the nucleus of the unknown element

d)

The number of valence electrons in the unknown element

62.

What groups are the most reactive metals?

a)

2 and 3

b)

1 and 18

c)

1 and 2

d)

16 and 17

63.

What groups are the most reactive non metals?

a)

1 and 2

b)

16 and 17

c)

2 and 17

d)

1 and 16

64.

Why are halogens so reactive?

a)

They want to get rid of their only valance electron

b)

They only need one more electron

c)

They are non reactive, they have a full shell

65.

How do electrons of an element determine that element's reactivity?

a)

If the valence shell has missing electrons it is very reactive to attract or lose more electrons.

b)

If the valence shell has a full ring of electrons it is very reactive because it needs more.

c)

If the valence shell has a full shell of electrons it is very reactive because it is already full.

d)

If the valence shell has missing electrons it is not reactive because it is missing electrons.

66.
Which of the following statements describes group 2 of the periodic table?
a)
Stable non-metals with 1 valence electron
b)
Stable Metals with 2 valence electrons
c)
Highly reactive non-metals with 1 valence electron.
d)
Highly reactive metals with 2 valence electrons.
67.
Describe this element.
a)
Highly reactive metal
b)
Highly reactive nonmetal
c)
Stable
d)
Less stable non metal
68.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
69.
The first energy level can hold up to how many electrons?
a)
8
b)
4
c)
2
d)
5
70.
What is the atomic mass of "F"
a)
9
b)
18
c)
17
d)
19
71.
all matter is made of what 
a)
energy 
b)
atoms 
c)
electrons 
d)
compounds 
72.
What is the atomic number for an element with three protons?
a)
2
b)
1
c)
3
d)
6
73.
A particle that moves around the nucleus is a(n)...
a)
Proton
b)
Neutron
c)
Electron
d)
Quark
74.
Most of the mass in an atom is concentrated in the...
a)
electrons
b)
nucleus
c)
protons
d)
empty space
75.
What does the nucleus consist of?
a)
Protons + Electrons
b)
Neutrons + Electrons
c)
Atoms
d)
Protons + Neutrons
76.
What does the 1.00794 stand for?
a)
Hydrogen
b)
atomic number
c)
atomic mass
d)
atomic explosion
77.
What are the 3 particles that make-up the atom?
a)
protons, neutrons, and isotopes
b)
neutrons, isotopes, and electrons
c)
positives, negatives, and electrons
d)
protons, neutrons, and electrons
78.
An atom's mass number equals the number of...
a)
protons plus the number of electrons
b)
protons plus the number of neutrons
c)
protons
d)
neutrons
79.
Which statement about the atomic nucleus is correct?
a)
The nucleus is made of protons and neutrons and has a negative charge
b)
The nucleus is made of protons and neutrons and has a positive charge
c)
The nucleus is made of electrons and has a positive charge
d)
The nucleus is made of electrons and has a negative charge
80.
Which statement best describes an electron?
a)
Smaller mass than a proton and a negative charge
b)
Smaller mass than a proton and a positive charge
c)
Greater mass than a proton and a negative charge
d)
Greater mass than a proton and a positive charge
81.
Beryllium has how many protons?
a)
4
b)
9.0122
c)
2
d)
13.0122
82.

An atom with atomic number 6 would have how many protons

a)

6

b)

12

c)

3

d)

cannot be determined

83.
If an atom has 3 electrons, how many protons does it have?
a)
1
b)
2
c)
4
d)
3
84.

How many valence electrons does a neutral atom with 15 protons have?

a)

6 Valence Electrons

b)

5 Valence Electrons

c)

4 Valence Electrons

d)

9 Valence Electrons

85.

An electrically neutral atom consists of 15 neutrons, 13 electrons, and a number of protons. What is its mass number?

a)

30

b)

20

c)

15

d)

28

86.

A core of ______ and_______grouped together surrounded by________.

Which of the following best completes the above statement about the structure of an atom?

a)

electrons, neutrons, protons

b)

protons, electrons, neutrons

c)

protons, electrons, ions

d)

protons, neutrons, electrons

87.

Which of the following lists contains atoms with the highest reactivity?

a)

He, Ne, Ar

b)

F, Cl, Br

c)

Zn, Cd, Hg

d)

C, Si, B

88.

In order to determine if two atoms are copper (Cu) atoms, what must be the same for each?

a)

the number of valence electrons

b)

the number of protons

c)

the charge of the atom

d)

the size of the atom

89.

The identifying characteristic of an element is its number of

a)

protons.

b)

neutrons.

c)

electrons.

d)

orbitals.

90.

An atom of tin has an atomic number of 50 and a mass number of 119. How many protons, electrons, and neutrons are found in one neutral atom of tin?

a)

50 protons, 69 electrons, 50 neutrons

b)

50 protons, 50 electrons, 69 neutrons

c)

69 protons, 50 electrons, 69 neutrons

d)

69 protons, 69 electrons, 50 neutrons

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