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Atomic Structure

Total questions: 117

Worksheet time: 1hrs 27mins

Name
Class
Date
1.

How many valence electrons are in hydrogen?

a)

1

b)

2

c)

3

d)

4

2.

How many valence electrons are in helium?

a)

1

b)

2

c)

3

d)

4

3.

How many valence electrons are in lithium?

a)

1

b)

2

c)

3

d)

4

4.

How many valence electrons are in beryllium?

a)

1

b)

2

c)

3

d)

4

5.

How many valence electrons are in boron?

a)

1

b)

2

c)

3

d)

4

6.

How many valence electrons are in carbon?

a)

1

b)

2

c)

3

d)

4

7.

How many valence electrons are in oxygen?

a)

2

b)

4

c)

6

d)

8

8.

How many valence electrons are in nitrogen?

a)

1

b)

3

c)

5

d)

7

9.

How many valence electrons are in fluorine?

a)

1

b)

3

c)

5

d)

7

10.

How many valence electrons are in cesium?

a)

1

b)

3

c)

5

d)

7

11.

How many valence electrons are in iodine?

a)

1

b)

3

c)

5

d)

7

12.

How many valence electrons are in strontium?

a)

2

b)

4

c)

6

d)

8

13.

How many valence electrons are in tellurium?

a)

2

b)

4

c)

6

d)

8

14.

How many valence electrons are in phosphorus?

a)

1

b)

3

c)

5

d)

7

15.

How many valence electrons are in calcium?

a)

2

b)

4

c)

6

d)

8

16.

multivalent

a)

the arrangement of electrons in an atom

b)

having multiple valence electrons (forming varied charges)

c)

each electron must occupy the lowest energy level possible

d)

a shortened version of an electron configuration using a noble gas

17.

configuration

a)

the arrangement of electrons in an atom

b)

having multiple valence electrons (forming varied charges)

c)

each electron must occupy the lowest energy level possible

d)

a shortened version of an electron configuration using a noble gas

18.

aufbau principle

a)

the arrangement of electrons in an atom

b)

having multiple valence electrons (forming varied charges)

c)

each electron must occupy the lowest energy level possible

d)

a shortened version of an electron configuration using a noble gas

19.

noble gas configuration

a)

the arrangement of electrons in an atom

b)

having multiple valence electrons (forming varied charges)

c)

each electron must occupy the lowest energy level possible

d)

a shortened version of an electron configuration using a noble gas

20.

Hund's rule

a)

must fill the lowest energy levels first

b)

all orbitals have to be singly occupied before they can be doubly occupied

c)

two electrons occupying the same orbital must have opposite spins

d)

there is inherent uncertainty in the measuring of location or speed of an electron

21.

Pauli Exclusion Principle

a)

must fill the lowest energy levels first

b)

all orbitals have to be singly occupied before they can be doubly occupied

c)

two electrons occupying the same orbital must have opposite spins

d)

there is inherent uncertainty in the measuring of location or speed of an electron

22.

Heisenberg's Uncertainty Principle

a)

must fill the lowest energy levels first

b)

all orbitals have to be singly occupied before they can be doubly occupied

c)

two electrons occupying the same orbital must have opposite spins

d)

there is inherent uncertainty in the measuring of location or speed of an electron

23.

we cannot know both the position and speed of an electron at the same time

a)

Heisenberg's Uncertainty Principle

b)

Hund's Rule

c)

Aufbau Principle

d)

Pauli Exclusion Principle

24.

all orbitals must be filled with at least one electron before any of them can hold two

a)

Heisenberg's Uncertainty Principle

b)

Hund's Rule

c)

Aufbau Principle

d)

Pauli Exclusion Principle

25.

electrons will be found in the lowest energy levels first

a)

Heisenberg's Uncertainty Principle

b)

Hund's Rule

c)

Aufbau Principle

d)

Pauli Exclusion Principle

26.

What element is this?

1s2 2s2 2p6 3s1

a)

magnesium

b)

sodium

c)

chlorine

d)

lithium

27.

What element is this?

1s2 2s2 2p6

a)

magnesium

b)

sodium

c)

neon

d)

lithium

28.

What element is this?

1s2 2s2 2p6 3s2 3p5

a)

magnesium

b)

sodium

c)

chlorine

d)

lithium

29.

What element is this?

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p2

a)

germanium

b)

oxygen

c)

titanium

d)

hydrogen

30.

What element is this?

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p3

a)

arsenic

b)

oxygen

c)

titanium

d)

hydrogen

31.

What element is this?

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5

a)

arsenic

b)

bromine

c)

titanium

d)

selenium

32.

What element is this?

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4

a)

arsenic

b)

oxygen

c)

titanium

d)

selenium

33.

What element is this?

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6

a)

arsenic

b)

oxygen

c)

krpton

d)

selenium

34.

What element is this?

[Ne] 3s2

a)

magnesium

b)

beryllium

c)

calcium

d)

sodium

35.

What element is this?

[Kr] 5s2 4d4

a)

molybdenum

b)

chromium

c)

tellurium

d)

rubidium

36.

Which of these is the correct electron configuration for scandium?

a)

1s2 2s2 2p6 3s2 3p6 4s2 3d1

b)

1s2 2s2 2p6 3s2 3p6 4s2 3d2

c)

1s2 2s2 2p6 3s2 3p6 4s2

d)

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d1

37.

Which of these is the correct electron configuration for phosphorus?

a)

1s2 2s2 2p6 3s2 3p3

b)

1s2 2s2 2p6 3s2

c)

1s2 2s2 2p3

d)

1s2 2s2 2p6 3s2 3p6 4s2 3d3

38.

Which of these is the correct electron configuration for lithium?

a)

1s1

b)

1s2 2s1

c)

1s1 2s2

d)

1s5

39.

Which of these is the correct electron configuration for copper?

a)

1s2 2s2 2p6 3s2 3p6 4s2 3d9

b)

1s2 2s2 2p3 3s2 3p6 4s2 3d9

c)

1s2 2s2 2p6 3s2 3p6 4s2 3d6

d)

1s6 2s2 2p6 3s2 3p6 4s2 3d9

40.

Which of these is the correct electron configuration for oxygen?

a)

1s2 1p6

b)

1s2 2s2 2p6

c)

1s2 2s2 2p4

d)

1s2 2s2 2p6 3s2 3p4

41.

This is an incorrect Bohr Model. What's wrong with it?

a)

too many valence electrons

b)

not enough valence electrons

c)

not enough electrons in the first energy level

d)

too many electrons in the first energy level

42.

This is an incorrectBohr model. What's wrong with it?

a)

there are too many valence electrons

b)

2 of the electrons should be in the first energy level

c)

there are too many electrons overall

d)

there are not enough valence electrons

43.

This is an incorrect Bohr Model. What's wrong with it?

a)

there are not enough electrons

b)

there are too many electrons in the second energy level

c)

there are too many valence electrons

d)

there are too many electrons in the first energy level

44.

This is an incorrect orbital notation. What's wrong with it?

a)

they didn't fill the 2s before filling up the rest of the orbitals

b)

there are too many electrons in 3p

c)

the electrons in 3s have opposite spins

d)

there are too many arrows

45.

Which of these is the correct orbital notation for silicon?

a)

b)

c)

d)

46.

Which electron configuration shows the arrangement of electrons in an atom of bromine?

a)

[K] 4s2 3d10 4p5

b)

[Ar] 4s2 3d10 4p5

c)

1s2 2s2 2p6 3s2 3p6 4s2 4d10 4p5

d)

1s2 2s2 3s2 4s2 2p6 3p6 4p5 4d10

47.

Beryllium has two valance electrons. When beryllium reacts with some other elements, it becomes an ion. What is the charge of a beryllium ion?

a)

-4

b)

-2

c)

+2

d)

+4

48.

Chlorine (Cl) is found in group 17 (7A) of the periodic table. Chlorine is commonly found combined with sodium (Na) to form table salt (NaCl). When chlorine reacts with sodium, how many electrons will a chlorine atom gain or lose?

a)

gain one electron

b)

lose one electron

c)

gain two electrons

d)

lose two electrons

49.

Which statement describes the relationship between the nucleus of an atom and the atom

itself?

a)

The nucleus determines the size of the atom

b)

The nucleus determines the shape of the atom.

c)

The nucleus contains most of the mass of the atom

d)

The nucleus contains the electrons and protons of the atom.

50.

Match the following element to their number of valence electrons:

a)

lithium

1.

1

b)

magnesium

2.

2

c)

phosphorus

3.

5

d)

fluorine

4.

7

e)

neon

5.

8

51.

Which one of the following has 4 electrons in its valence shell?

a)

C

b)

S

c)

P

d)

F

52.
Which of these elements has 3 valence electrons
a)
aluminum
b)
oxygen
c)
sodium
d)
helium
53.

Match the following elements with their correspomding number of valence electrons

a)

1

1.

Hydrogen

b)

2

2.

Magnesium

c)

3

3.

Aluminum

d)

7

4.

Bromine

e)

6

5.

Oxygen

54.

Match the following elements with the correct number of valence electrons.

a)

H

1.

1

b)

Sr

2.

2

c)

Al

3.

3

d)

C

4.

4

e)

P

5.

5

55.

Where is the smallest negatively-charged particle found in an atom?

a)

nucleus

b)

around the nucleus

c)

orbiting in the nucleus

d)

between the proton & neutron

56.

An atom of the element chlorine can be represented by the Bohr model shown here. If the atomic mass of chlorine is 35, how many neutrons are in the nucleus?

a)

35

b)

17

c)

18

d)

7

57.

An isotope of cobalt is indicated by the image here, which indicates that it has ​ (a)   ​ protons and (b)   neutrons.

Choose from the below words
27
33
60
87
58.

An isotope of beryllium is indicated by the image here, which indicates that it has ​ (a)   protons and ​ (b)   neutrons.

Choose from the below words
4
6
3
5
59.

An isotope of iron is indicated by the image here, which indicates that it has ​ (a)   protons and ​ (b)   neutrons.

Choose from the below words
26
32
30
58
60.

Magnesium has three isotopes. Mg-24 has a relative abundance of 78.99%. Mg-26 has an abundance of 11.01%. Mg-25 is 10.0%. Calculate the average atomic mass of magnesium.

(round to one decimal place)

61.

Iridium-191 has an abundance of 30.58% and iridium-193 has an abundance of 69.42%. Calculate the average atomic mass of iridium.

Round to one decimal place.

62.

Rubidium has 2 common isotopes, rubidium-85 and rubidium-87. The abundance of Rb-85 is 72.2% and Rb-87 is 27.8%. What is the average atomic mass of rubidium?

a)

85.6 amu

b)

85.5 amu

c)

85.4 amu

d)

85.8 amu

63.

Match the term with its example

a)

1.

orbital notation

b)

2.

electron configuration

c)

3.

Lewis Dot Structure

d)

4.

Bohr Model

64.

a representation of a system, process, or event that helps scientists understand and explain the world around them

a)

periodic table

b)

scientific method

c)

scientific model

d)

hypothesis

65.

a representation of a particular observable phenomenon

a)

periodic table

b)

scientific method

c)

scientific model

d)

hypothesis

66.

simplified representations or frameworks that help explain, predict, and understand complex phenomena

a)

periodic table

b)

scientific method

c)

scientific model

d)

hypothesis

67.

The atomic number of aluminum is 13. What is the correct designation of the electron configuration of aluminum?

a)

1s2 1p6 2s2 2p1

b)

1s2 2s2 2p6 3s3

c)

1s2 2s2 2p6 2d3

d)

1s2 2s2 2p6 3s2 3p1

68.

Lewis dot structures are useful in determining the reactivity of an element. Based on the Lewis dot structures shown, which element is MOST likely to become a positive ion in reactions?

a)

b)

c)

d)

69.

The Lewis dot diagram for an unidentified element is shown here. Which element could X represent?

a)

iron

b)

aluminum

c)

chlorine

d)

silicon

70.

The Lewis dot diagram for an unidentified element is shown here. Which element could X represent?

a)

iron

b)

aluminum

c)

chlorine

d)

sulfur

71.

The Lewis dot diagram for an unidentified element is shown here. Which element could X represent?

a)

iron

b)

nitrogen

c)

chlorine

d)

sulfur

72.

The electron configuration for an atom is

[Xe] 6s2 4f14 5d1.

What element does this configuration represent?

a)

lanthanum

b)

hafnium

c)

lutetium

d)

yttrium

73.

The diagram below represents the Lewis dot structure for fluorine.

Which statement BEST describes the Lewis dot structure for fluorine

a)

Fluorine has a total of seven electrons

b)

Fluorine generally forms an ion by losing one electron

c)

Fluorine tends to form seven ionic bonds

d)

Fluorine has 7 valence electrons

74.

The diagram pictured here shows the Lewis Dot Structure for different elements.

The electron configuration for an unknown element is 1s2 2s2 2p3. Which of these represents its Lewis Dot Structure?

a)

1

b)

2

c)

3

d)

4

75.

How many electrons are represented in the Lewis dot structure for aluminum (Al)?

76.

How many electrons are represented in the Lewis dot structure for potassium (K)?

77.

How many electrons are represented in the Lewis dot structure for Bromine (Br)?

78.

How many electrons are represented in the Lewis dot structure for selenium (Se)?

79.

The dot structure for the element sodium is shown here. Which of these describes the behavior necessary for sodium to bond with another element?

a)

Sodium will lose 1 electron and form an ion

b)

Sodium will gain 7 electrons and form an ion.

c)

Sodium will share 1 electron in a covalent bond

d)

Sodium will share 7 electrons in a covalent bond

80.

A neutral chlorine atom contains 17 protons and 18 neutrons. A chlorine ion (Cl-1) has ___ electrons.

a)

17

b)

18

c)

16

d)

35

81.

A neutral sodium atom (Na) contains 11 protons and 12 neutrons. A sodium ion (Na+1) has​ (a)   electrons.

Choose from the below words
10
9
11
82.

A neutral oxygen atom contains 8 protons and 8 neutrons. An oxygen ion (O2-) has ___ electrons.

83.

A neutral nitrogen atom contains 7 protons and 7 electrons. A nitrogen ion (N3-) has ___ electrons.

84.

Which statement BEST describes the characteristic shared by three isotopes of an element?

a)

The isotopes share the same number of protons

b)

The isotopes share the same chemical stability

c)

The isotopes have the same atomic mass

d)

The isotopes have the same number of neutrons

85.

Beryllium has two valence electrons. When beryllium reacts with some other elements, it becomes an ion. What is the charge of a beryllium ion?

a)

-4

b)

-2

c)

+2

d)

+4

86.

Fluorine has seven valence electrons. When fluorine reacts with some other elements, it becomes an ion. What is the charge of a fluorine ion?

a)

+1

b)

-2

c)

+2

d)

-1

87.

Sulfur has six valence electrons. When sulfure reacts with some other elements, it becomes an ion. What is the charge of a sulfur ion?

a)

+3

b)

-2

c)

-1

d)

+6

88.

Chlorine (Cl) is found in group 17 (7A) of the periodic table. Chlorine is commonly found combined with sodium (Na) to form table salt (NaCl). When chlorine reacts with sodium, how many electrons will a chlorine atom gain or lose?

a)

gain one electron

b)

gain two electrons

c)

lose one electron

d)

lose two electrons

89.

Sodium is found in group 1 (1A) of the periodic table. Sodium is commonly found combined with chlorine (Cl) to form table salt (NaCl). When chlorine reacts with sodium, how many electrons will a sodium atom gain or lose?

a)

gain one electron

b)

gain two electrons

c)

lose one electron

d)

lose two electrons

90.

Which statement describes the relationship between the nucleus of an atom and the atom itself?

a)

The nucleus determines the size of the atom

b)

The nucleus determines the shape of the atom

c)

The nucleus contains most of the mass of the atom

d)

The nucleus contains the electrons and protons of the atom

91.

An atom of the element selenium has an atomic number of 34. If the atomic mass of this atom is 80, how many neutrons are in the nucleus?

a)

46

b)

45

c)

19

d)

24

92.

Which statement best describes these samples?

a)

The chemical properties are different for each element

b)

The atomic number is different for each element

c)

They are allotropes of the same element

d)

They are isotopes of the same element

93.

Which statement best describes these samples?

a)

The chemical properties are different for each element

b)

The atomic number is different for each element

c)

They are allotropes of the same element

d)

They are isotopes of the same element

94.

What is the electron configuration of this atom?

a)

1s2 2s2 2p6 3s2 3p4

b)

1s2 2p8 3s2 3p4

c)

1s2 2s2 2p4

d)

1s2 2s2 2p6 3s2 3p6

95.

What is the electron configuration of this atom?

a)

1s2 2s2 2p6 3s2

b)

1s2 2s2 2p6

c)

1s2 2s2

d)

1s2 2s2 2p6 3s2 3p6 4s2

96.

What is the electron configuration of this atom?

a)

1s2 2s2 2p6 3s5

b)

1s2 2s2 2p6 3s2 3p5

c)

1s2 2s2 2p5

d)

1s2 2s2 2p6 3s3 3p4

97.

The atomic number of fluorine is 9. What is the correct designation of the electron configuration of fluorine?

a)

1s2 2s2 2p5

b)

1s2 2s2 2p6 3s2 3p5

c)

1s2 2s4 2p3

d)

1s2 2s2 2p6

98.

The image here shows the Lewis Dot Structure for different elements. The electron configuration for an unknown element is 1s2 2s2 2p6 3s2 3p5. Which of the following represents its Lewis Dot Structure?

a)

1

b)

2

c)

3

d)

4

99.

The image here shows the Lewis Dot Structure for different elements. The electron configuration for an unknown element is 1s2 2s2 2p6 3s2 3p5. Which of the following represents its Lewis Dot Structure?

a)

1

b)

2

c)

3

d)

4

100.

The image here shows the Lewis Dot Structure for different elements. The electron configuration for an unknown element is 1s2 2s1. Which of the following represents its Lewis Dot Structure?

a)

1

b)

2

c)

3

d)

4

101.

Convert 515 oz to pounds.

1 lb = 16 oz

Round to one decimal point.

102.

Convert 566 lbs to tons.

1 ton = 2000 lbs

Round to two decimal points

103.

A 2018 Camaro weiighs 4113 lbs. What is that in tons?

(1 ton = 2000 lbs)

a)

2.06 tons

b)

4.1 tons

c)

0.486 tons

d)

8300 tons

104.

The distance from CHS to the Pleasure Pier in Galveston is 52.1 miles. What is that in kilometers?

(1 mile = 1.61 km)

a)

83.9 km

b)

52.1 km

c)

32.4 km

d)

77.6 km

105.

What is the name of the isotope that has 5 protons and 6 neutrons?

a)

boron-11

b)

boron-10

c)

carbon-12

d)

carbon-11

106.

How many neutrons are in the isotope carbon-14?

a)

12

b)

14

c)

6

d)

8

107.

How many neutrons are in the isotope aluminum-27?

108.

What is the name of the isotope that has ten protons and 11 neutrons?

(a)  

109.

What is the symbol of the isotope that has 15 protons and 16 neutrons?

a)

b)

c)

d)

110.

What is the symbol for the isotope, sodium-24?

a)

b)

c)

d)

111.

What is the symbol for theisotope, iron-56?

a)

b)

c)

d)

112.

What is the name for the isotope that has 5 protons and 6 neutrons?

(a)  

113.

How many protons are in the isotope potassium-39?

114.

How many protons are inthe isotope copper-65?

115.

Lithium has two naturally occurring isotopes: lithium-6 and lithium-7. If the average atomic mass of lithium is 6.941 amu, which isotope is the most abundant?

a)

lithium-6

b)

lithium-7

c)

lithium-3

116.

Magnesium has two naturally occurring isotopes, magnesium-24 and magnesium-26. The average atomic mass of magnesium is 24.305, so which isotope is more abundant?

a)

magnesium-24

b)

magnesium-26

117.

Platinum has two naturally occurring isotopes, Pt-195 and Pt-196. The average atomic mass for platinum is 195.08. Which of these is the likely Percent Abundance for Pt-195?

a)

99%

b)

75%

c)

50%

d)

10%

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