Free Printable Unit 2 Test REVIEW

1.

Which of the following represents an element?

a)

H₂O

b)

H₂

c)

NaCl

d)

CaCO₃

2.

Element or Compound?
H₂SO₄

a)

Element

b)

Compound

3.

How many different elements are in this compound?

a)

1

b)

2

c)

3

d)

4

4.

How many DIFFERENT elements are represented in this compound?

a)

3

b)

4

c)

5

d)

6

5.

Is this an example of an element or compound?

a)

element

b)

compound

6.

Which of the following is not a compound?

a)

HCl

b)

Cl

c)

NaCl

d)

CO2

7.

Contains only one kind of atom.

a)

Element

b)

Compund

c)

Mixture

8.

Contains two or more atoms combined

a)

Elements

b)

Compounds

c)

Mixtures

9.

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

10.

What is the mass number of this atom?

a)

1

b)

3

c)

4

d)

7

11.

A fluorine atom has 9 protons and 10 neutrons. What is the atomic number of fluorine?

a)

9

b)

10

c)

19

d)

1

12.

A phosphorus atom has 15 protons and 16 neutrons. What is the mass number?

a)

15

b)

16

c)

31

d)

1

13.

What is the mass number of an atom that contains 8 protons, 9 neutrons, and 8 electrons?

a)

8

b)

9

c)

16

d)

17

14.

Using mass number 31, Phosphorus will have how many neutrons?

a)

15

b)

16

c)

31

d)

1

15.

Using mass number 59, Cobalt will have how many neutrons?

a)

27

b)

28

c)

32

d)

33

16.

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

17.

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

a)

ions

b)

isotopes

c)

quarks

d)

molecules

18.

This isotope of Titanium has:

(a) protons

22 electrons

(b) neutrons

mass number of (c)

Choose from the below words

22

26

48

70

47

21

19.

An isotope is an atom of the (a) element but with a different number of (b) . This difference causes the (c) of the atom to change.

Choose from the below words

same

neutrons

mass

different

protons

electrons

charge

atomic number

20.

Match the following

a)

the mass of the atom is found here

1.

nucleus

b)

these are in the nucleus

2.

protons & neutrons

c)

if you change the number of protons you get a different...

3.

element

d)

if you change the number of neutrons you get a different...

4.

mass

e)

an isotope has the same number of protons but a different number of...

5.

neutrons

21.

Label the nuclear symbol for Calcium with a mass of 41.

a)

19

b)

41

c)

22

d)

20

e)

40

f)

21

g)

39

1

2

3

1)

2)

3)

22.

Match the following

a)

number of protons & electrons

1.

18

b)

number of neutrons

2.

22

c)

mass number

3.

40

23.

What is the mass number for the isotope shown?

a)

29

b)

34

c)

63

d)

92

24.

How many neutrons are in the nucleus of copper-63?

a)

29

b)

34

c)

63

d)

92

25.

How many protons are in this isotope?

a)

9

b)

21

c)

12

26.

How many neutrons does the isotope of lithium have?

a)

8

b)

3

c)

4

d)

5

27.

How many protons are in the following symbol?

a)

35

b)

17

c)

18

d)

30

28.

What element would have this symbol?

a)

Neptunium (Np)

b)

Niobium (Nb)

c)

Tellurium (Te)

d)

Carbon (C)

29.

How many neutrons are in the following symbol?

a)

7

b)

8

c)

15

d)

10

30.

Which is the best nuclear symbol for a potassium atom with 21 neutrons?

a)

b)

c)

d)

31.

Which of the following is the nuclear symbol for lithium-6

a)

b)

c)

d)

32.

The correct hyphen notation for the nuclear symbol given is

a)

chromium - 24

b)

chromium - 50

c)

chromium - 74

d)

chromium - 26

33.

The hyphen notation of an atom of calcium with 20 protons, 20 electrons, and 22 neutrons is

a)

calcium - 20

b)

calcium - 40

c)

calcium - 62

d)

calcium - 42

34.

The number 84 in strontium - 84 represents

a)

the atomic number

b)

the mass number

c)

the average atomic mass

d)

the number of electrons

35.

A wave with a large wavelength will have a ______ frequency and _____ energy

a)

high, low

b)

high, high

c)

low, high

d)

low, low

36.

As wavelength increases, frequency ___________.

a)

increases

b)

decreases

c)

stays the same

d)

unknown

37.

As frequency increases, energy ________.

a)

increases

b)

decreases

c)

stays the same

d)

unknown

38.

The energy of an electron __________ as it moves further away from the nucleus

a)

increases

b)

decreases

39.

What happens to energy as an atom goes from ground state to excited state?

a)

It increases

b)

It decreases

c)

It remains the same

40.

Lowest energy state of an atom

a)

Ground

b)

Excited

41.

For an electron to change from ground state to an excited stated it must...

a)

Absorb energy

b)

Release energy

42.

What is the maximum number of electrons allowed in the second shell?

a)

1

b)

2

c)

8

d)

3

43.

How many valence electrons does Carbon have?

a)

4

b)

12

c)

6

d)

14

44.

How many valence electrons does Oxygen have?

a)

8

b)

2

c)

16

d)

6

45.

The electron moves from position 1 to 2. How does the state of the electron shift during this reaction?

a)

The electron becomes less excited.

b)

The electron returns to the ground state.

c)

The electron becomes more excited.

d)

Light is emitted

46.

Light is emitted when electrons ...

a)

return from high energy state to low energy state

b)

jump from low energy state to high energy state

c)

either of these

d)

none of these

47.

If an electron moves from n=4 to n=2 it ____

a)

absorbs energy

b)

releases energy

48.

How many protons does this element have?

a)

20

b)

40

c)

8

d)

2

49.

How many electrons does this element have?

a)

11

b)

23

c)

12

d)

1

50.

How many neutrons does this element have?

a)

45

b)

80

c)

35

d)

7

51.

How many valence electrons does this element have?

a)

17

b)

35

c)

13

d)

7

52.

How many valence electrons does this element have?

a)

11

b)

23

c)

12

d)

1

53.

How many subatomic particles does does this element have in the nucleus?

a)

45

b)

80

c)

35

d)

7

54.

What element does this bohr model represent?

a)

Si

b)

S

c)

Ni

d)

H

55.

What element does this bohr model represent?

a)

Si

b)

S

c)

Ni

d)

H

56.

What atom does this Bohr Model represent?

(a)

57.

An element with five valence electrons is

a)

phosphorus

b)

oxygen

c)

beryllium

d)

rubidium

58.

What's a valence electron?

a)

electrons in the second energy level

b)

electrons in the outermost energy level

c)

the atomic number

d)

electrons in the first level

59.

?

a)

Helium

b)

Hydrogen

c)

Argon

d)

Silver

60.

How many valence (outer) electrons does an Oxygen atom have?

a)

2

b)

6

c)

8

d)

16

61.

How many electrons can fit on the 1st energy level (orbital) for any Bohr Model?

a)

2

b)

6

c)

8

d)

10

62.

How many valence electrons?

a)

2

b)

3

c)

5

d)

10

63.

On the periodic table, Periods are

a)

Horizontal rows

b)

Vertical columns

64.

What period is this element located in?

a)

2

b)

20

c)

4

d)

3

65.

Which Bohr model represents Neon?

a)

b)

c)

d)

66.

The elements F, Cl, and I are all in the same column on the periodic table. Which is the best explanation for this arrangement.

a)

They have the same number of energy levels

b)

They were all discovered at ancient times

c)

They were all gases at room temperature

d)

they have the same number of valence electrons

67.

The period number tells you the number of

a)

protons

b)

energy levels

c)

valence electrons

68.

How many energy levels does Au have? Just give me the number.

(a)

69.

How many energy levels does O have? Just give me the number.

(a)

70.

How many energy levels does Rb have? Just give me the number.

(a)

71.

How many energy levels does He have? Just give me the number.

(a)

72.

How many energy levels does Mg have? Just give me the number.

(a)

73.

what period would this element be in?

a)

6

b)

8

c)

3

d)

16

74.

what period would this element be in?

a)

8

b)

3

c)

4

d)

7

75.

what period would this element be in?

a)

2

b)

3

c)

4

d)

5

76.

what period would this element be in?

a)

2

b)

3

c)

5

d)

7

77.

Which of the following elements has the greatest amount of energy levels?

a)

Boron

b)

Gallium

c)

Thallium

d)

They have the same number of energy levels.

78.

How many valence electrons does Tin (Sn) have?

a)

8

b)

7

c)

5

d)

4

79.

How many valence electrons does Lithium (Li) have?

a)

8

b)

1

c)

5

d)

2

80.

Which of the following will have similar properties to 1s² 2s² 2p⁶ 3s² 3p²?

a)

carbon

b)

calcium

c)

chlorine

d)

cesium

81.

Which of the following will have similar properties to 1s² 2s² 2p⁶ 3s² 3p²?

a)

carbon

b)

calcium

c)

chlorine

d)

cesium

82.

What is the electron configuration for potassium?

a)

1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹

b)

1s² 2s² 2p⁶ 3s² 3p⁶ 4s²

c)

1s² 2s¹ 2p⁶ 3s² 3p⁵ 4s¹

d)

1s² 2s² 2p⁶ 3s¹

83.

What electron configuration matches an oxygen atom?

a)

1s²2s²2p⁶3s2, 3p⁶4s²3d¹⁰4p⁵

b)

1s²2s²2p⁴

c)

1s²2s²2p⁶

d)

1s²2s²2p⁶3s²3p⁶4s²3d¹

84.

Identify the Electron Configuration for Aluminum (Al)

a)

1s²2s²2p⁶3s²3p¹

b)

1s²2s²2p⁶3s²3p³

c)

1s²2s²2p⁶3s²4p¹

85.

What is the position of an element in the periodic table if its electron configuration is 1s² 2s² 2p⁶ 3s² 3p⁵?

a)

Group 1

b)

Group 2

c)

Group 15

d)

Group 17

86.

The electron configuration of an atom is 1s²2s²2p⁶. The number of electrons in the atom is

a)

3

b)

6

c)

8

d)

10

87.

Which electron configuration belongs to Chlorine (Cl)?

a)

1s²2s²2p⁶3s²3p⁵

b)

1s²2s²2p⁶3s²3p⁶

c)

1s²2s²2p⁶3s²3p⁷

88.

What do you start electron configuration with?

a)

1s²

b)

1d¹⁰

c)

1f¹⁴

d)

1p⁶

89.

What is the noble gas notation electron for Sulfur?

a)

[Ne] 3p⁴

b)

[He] 3s²3p⁴

c)

[Ne] 3s²3p⁴

d)

[Na] 3s²3p⁴

90.

Whta is the noble gas notation for V?

a)

[Ar] 4s² 4d²

b)

[Kr] 4s² 3d³

c)

[Ar] 4s² 4d³

d)

[Ar] 4s² 3d³

91.

What is the noble gas configuration for silicon?

a)

[Ne] 3s² 3p¹

b)

[Ar] 4s¹

c)

[Kr] 5s¹

d)

[Ne] 3s² 3p²

92.

Match the parts of the electron configuration to what it represents.

a)

1

1.

period

b)

s

2.

block

c)

2

3.

element

93.

Finish the electron configuration for chlorine:

1s² 2s² (a) 3s² 3p⁶

94.

Match the group to the configuration that it ends with.

group 13 (a) group 2 (b) group 17 (c) group 14 (d) group 1 (e)

Choose from the below words

s1

p1

s2

p5

p2

p3

p4

p6

95.

This element's electron configuration got mixed up! What element is this?

x6 x2 x10 x6 x6 x2 x2 x2 x9 x2

(a)

96.

What is the missing piece?

1s² 2s² ___ 3s¹

a)

2p⁶

b)

2p⁴

c)

3p⁶

d)

3s²

97.

What are the missing pieces?

1s² 2s² 2p⁶ ___3p⁶ 4s² ___ 4p²

a)

3s² , 4d¹⁰

b)

2p⁴ , 3d¹⁰

c)

3p⁶ , 3d¹⁰

d)

3s² , 3d¹⁰

98.

Match the element to it's noble gas notation:

a)

krypton

1.

[Kr]

b)

silicon

2.

[Ne] 3s² 3p²

c)

strontium

3.

[Kr] 5s²

d)

copper

4.

[Ar] 4s² 3d⁹

99.

Reorder these from shortest electron configuration to the longest:

a)

hydrogen

b)

boron

c)

argon

d)

calcium

e)

xenon

1)

2)

3)

4)

5)

100.

The vertical columns on the periodic table are called...

a)

periods

b)

groups

c)

sections

d)

blocks

101.

This could be the dot diagram of

a)

Mg

b)

Cl

c)

C

d)

S

102.

How many valence electrons should Lithium have in its Lewis dot model?

a)

1

b)

2

c)

3

d)

4

103.

How many valence electrons should Oxygen have in its Lewis dot model?

a)

5

b)

6

c)

7

d)

8

104.

How many valence electrons should Magnesium have in its Lewis dot model?

a)

1

b)

2

c)

3

d)

4

105.

This is a correct dot diagram for nitrogen (N)

a)

true

b)

false

106.

This is a correct dot diagram for carbon (C)

a)

true

b)

false

107.

This is a correct dot diagram for neon (Ne)

a)

true

b)

false

108.

How many electrons should Indium have around its Lewis dot model?

a)

1

b)

2

c)

3

d)

4

109.

This is the correct dot diagram for nitrogen, group 15.

a)

true

b)

false

110.

Which of these is correct?

a)

b)

c)

111.

Which of the following shows a correct Lewis dot structure?

a)

b)

c)

d)

112.

How would you draw a Lewis dot diagram for Magnesium?

a)

b)

c)

d)

113.

Which of these is incorrect?

a)

b)

114.

This is a correct dot diagram for oxygen (O)

a)

true

b)

false

115.

This could be the dot diagram of

a)

O

b)

Ga

c)

Li

d)

Ne

116.

s² 2s² 2p⁶ 3s² 3p⁵ would match which Lewis Dot Diagram? (a)

s² 2s² 2p⁶ 3s² 3p² would match which Lewis Dot Diagram? (b)

s² 2s² 2p⁶ 3s² would match which Lewis Dot Diagram? (c)

s² 2s² 2p⁶ 3s² 3p⁴ would match which Lewis Dot Diagram? (d)

s² 2s² 2p⁶ 3s² 3p³ would match which Lewis Dot Diagram? (e)

Choose from the below words

G

D

B

F

E

A

C

H

117.

How do you know how many valence electrons an element has?

a)

by the group number

b)

by the period number

c)

by the atomic number

d)

by the mass number

118.

What do the dots in a Lewis Dot Diagram represent?

a)

energy levels

b)

valence electrons

c)

protons

d)

neutrons

Unit 2 Test REVIEW

Total questions: 118

Worksheet time: 2hrs 18mins

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