Free Printable Chemistry Molecule number of atoms

1.

How many protons does this isotope of titanium have?

a)

48

b)

22

c)

26

d)

70

2.

How many neutrons does the isotope of lithium have?

a)

8

b)

3

c)

4

d)

5

3.

How many electrons does a Copper atom have?

a)

63

b)

29

c)

92

d)

34

4.

Found in the nucleus of the atom

a)

electrons only

b)

protons only

c)

neutrons and protons

d)

neutrons and electrons

5.

An element is defined by its number of

a)

protons

b)

electrons

c)

neutrons

d)

protons + electrons

6.

Isotopes of an element have a different number of...

a)

Protons

b)

Neutrons

c)

Electrons

d)

Mass

7.

How many neutrons does the isotope below have? ⁸⁹ ₃₆Kr

a)

53

b)

36

c)

89

d)

125

8.

A neutral atom of the isotope ²⁶₁₂Mg would consist of

a)

12 protons, 26 neutrons, 26 electrons

b)

26 protons, 12 neutrons, 26 electrons

c)

26 protons, 14 neutrons, 14 electrons

d)

12 protons, 14 neutrons, 12 electrons

9.

An atom has 12 protons and 13 neutrons in its nucleus. Which is the correct symbol?

a)

b)

c)

d)

10.

A carbon isotope consists of 6 protons, 6 electrons and 8 neutrons. What is the mass number for this isotope?

a)

12

b)

14

c)

6

d)

8

11.

^{The photo above shows the isotopic notation for which isotope?}

a)

Carbon 12

b)

Carbon 13

c)

Carbon 14

d)

Carbon 15

12.

What atom matches this electron configuration?
1s²2s²2p⁶3s²

a)

Neon

b)

Magnesium

c)

Aluminum

d)

Potassium

13.

Which is the electron configuration for an oxygen atom?

a)

1s²2s²2p⁶3s²3p⁶4s²

b)

1s²2s²2p⁴

c)

1s²2s²2p⁶

d)

1s²2s²2p⁶3s²3p⁶

14.

Which element is pictured?

a)

neon

b)

fluorine

c)

magnesium

d)

argon

15.

How many valence electrons does Chlorine have?

a)

5

b)

2

c)

7

d)

5

16.

What atom matches this electron configuration?
1s²2s²2p⁶3s²3p⁶4s²3d¹⁰

a)

Zinc

b)

Copper

c)

Nickel

d)

Germanium

17.

How are the elements in the periodic table arranged?

a)

by the number of neutrons

b)

by the atomic number of an element

c)

by the atomic mass of an element

18.

How many protons are in Beryllium?

a)

4

b)

9

c)

5

d)

2

19.

The horizontal rows of elements in the periodic table are called

a)

Families

b)

Groups

c)

Periods

d)

Elements

20.

________ are the COLUMNS on the periodic table and are organized by similar properties.

a)

Classifications

b)

Groups

c)

Periods

d)

Elements

21.

Atoms with similar properties are most likely located...

a)

in the same period.

b)

in the same group or family.

22.

What does the atomic number of an element tell you?

a)

the number of neutrons

b)

the number of valence electrons

c)

the number of electrons

d)

the number of protons

23.

What is the number of protons that the element in this image contain?

a)

14

b)

7

c)

15

d)

18

24.

Carbon

a)

CA

b)

C

c)

Ca

d)

Cn

25.

Sn

a)

tin

b)

sulfur

c)

iron

d)

sodium

26.

Zinc

a)

Z

b)

Zi

c)

ZN

d)

Zn

27.

Sulfur

a)

Sf

b)

Su

c)

Sr

d)

S

28.

Neon

a)

N

b)

No

c)

Ne

d)

Nn

29.

Calcium

a)

Cl

b)

Ca

c)

C

d)

Cm

30.

Copper

a)

CU

b)

Cp

c)

Cu

d)

Cr

31.

Helium

a)

He

b)

Hl

c)

HE

d)

Hm

32.

Hydrogen

a)

Hy

b)

H

c)

Hr

d)

Hn

33.

N

a)

Sodium

b)

Nitrogon

c)

Nonium

d)

Nitrogen

34.

Gold

a)

Go

b)

Gl

c)

AU

d)

Au

35.

Pb

a)

Gold

b)

Lead

c)

peanut butter

d)

Paribium

36.

Iron

a)

Ir

b)

In

c)

Fe

d)

FE

37.

Nickel

a)

Ni

b)

N

c)

Nl

d)

Nc

38.

Mercury

a)

Me

b)

Hg

c)

HG

d)

ME

39.

Iodine

a)

Ie

b)

I

c)

Id

d)

Io

40.

Potassium

a)

P

b)

K

c)

Pt

d)

k

41.

Aluminum

a)

A

b)

Al

c)

Am

d)

Au

42.

Mg

a)

Manganese

b)

Mangium

c)

Magnesium

d)

Manzanium

43.

Xenon

a)

Xe

b)

X

c)

Xn

d)

Xo

44.

What is the chemical symbol for the element hydrogen

a)

H

b)

He

c)

h

d)

he

45.

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

46.

What is the atomic number of this nucleus?

a)

1

b)

3

c)

4

d)

7

47.

What is the atomic number of this atom?

a)

4

b)

5

c)

9

d)

none of the above

48.

What is the atomic number of this atom?

a)

9

b)

10

c)

19

d)

27

49.

What is the atomic number of this atom?

a)

2

b)

4

c)

6

d)

none of the above

50.

What is the atomic number of this atom?

a)

1

b)

2

c)

3

d)

4

51.

What is the atomic number of this atom?

a)

7

b)

14

c)

21

d)

none of the above

52.

What is the atomic number of Be?

a)

2

b)

4

c)

6

d)

8

53.

What is the atomic number of Cu?

a)

25

b)

26

c)

27

d)

29

54.

What is the atomic number of vanadium?

a)

19

b)

21

c)

23

d)

25

55.

What is the atomic number of aluminum?

a)

10

b)

11

c)

12

d)

13

56.

What is the atomic number of fluorine?

a)

4

b)

5

c)

7

d)

9

57.

Atomic number 21 is

a)

Ca

b)

Sc

c)

Fe

d)

Co

58.

Atomic number 25 is

a)

Ni

b)

Mg

c)

Mn

d)

Zn

59.

Atomic number 26 is

a)

Fe

b)

Cr

c)

Si

d)

Cl

60.

Atomic number 11 is

a)

Ar

b)

K

c)

Na

d)

Ti

61.

Atomic number 19 is

a)

H

b)

He

c)

K

d)

Sc

62.

What is the atomic number of boron?

a)

3

b)

4

c)

5

d)

6

63.

What is the atomic number of lithium?

a)

2

b)

3

c)

4

d)

5

64.

What is the atomic number of hydrogen?

a)

4

b)

3

c)

2

d)

1

65.

What is the atomic number of oxygen?

a)

10

b)

9

c)

8

d)

7

66.

What is the atomic number of nitrogen?

a)

6

b)

7

c)

8

d)

9

67.

Atomic number 2 is

a)

oxygen

b)

carbon

c)

helium

d)

hydrogen

68.

Atomic number 18 is

a)

neon

b)

helium

c)

argon

d)

chlorine

69.

Atomic number 28 is

a)

chromium

b)

iron

c)

nickel

d)

phosphorus

70.

Atomic number 30 is

a)

sulfur

b)

zinc

c)

potassium

d)

sodium

71.

Atomic number 12 is

a)

manganese

b)

silicon

c)

titanium

d)

magnesium

72.

How many protons in a neutral lithium atom?

a)

3

b)

7

c)

4

d)

1

73.

How many electrons in a neutral lithium atom?

a)

3

b)

7

c)

4

d)

1

74.

How many electrons in a neutral lithium ion (Li⁺¹)?

a)

3

b)

7

c)

4

d)

2

75.

How many protons in a neutral lithium ion (Li⁺¹)?

a)

3

b)

7

c)

4

d)

2

76.

How many protons in a neutral oxygen atom?

a)

8

b)

7

c)

10

d)

16

77.

How many electrons in a neutral oxygen atom?

a)

8

b)

7

c)

10

d)

16

78.

How many electrons in an oxygen ion (O^-2)?

a)

8

b)

7

c)

10

d)

16

79.

How many protons in an oxygen ion (O^-2)?

a)

8

b)

7

c)

10

d)

16

80.

How many protons in a neutral nitrogen atom?

a)

14

b)

7

c)

10

d)

4

81.

How many electrons in a neutral nitrogen atom?

a)

14

b)

7

c)

10

d)

4

82.

How many electrons in a nitrogen ion (N^-3)?

a)

14

b)

7

c)

10

d)

4

83.

How many protons in a nitrogen ion (N^-3)?

a)

14

b)

7

c)

10

d)

4

84.

How many protons in a neutral aluminum atom?

a)

13

b)

27

c)

16

d)

10

85.

How many electrons in a neutral aluminum atom?

a)

13

b)

27

c)

16

d)

10

86.

How many electrons in an aluminum ion (Al⁺³)?

a)

13

b)

27

c)

16

d)

10

87.

How many protons in an aluminum ion (Al⁺³)?

a)

13

b)

27

c)

16

d)

10

88.

How many protons in a neutral calcium atom?

a)

20

b)

40

c)

18

d)

22

89.

How many electrons in a neutral calcium atom?

a)

20

b)

40

c)

18

d)

22

90.

How many electrons in a neutral calcium atom?

a)

20

b)

40

c)

18

d)

22

91.

How many electrons in a calcium ion (Ca⁺²)?

a)

20

b)

40

c)

18

d)

22

92.

How many protons in a calcium ion (Ca⁺²)?

a)

20

b)

40

c)

18

d)

22

93.

2H₂O
How many Hydrogen atoms are present?

a)

2

b)

4

c)

1

d)

10

94.

2H₂O
How many Oxygen atoms are present?

a)

2

b)

4

c)

1

d)

5

95.

2H₂O
How many H₂O molecules are present?

a)

1

b)

4

c)

2

d)

8

96.

In the following molecule, how many fluorine atoms are there: 3Na₂F

a)

one

b)

two

c)

three

d)

four

97.

In the molecule below, how many sodium atoms are there: 3Na₂F

a)

two

b)

four

c)

six

d)

eight

98.

In making the molecule HPNa, which element is not used?

a)

Hydrogen

b)

Phosphorus

c)

Potassium

d)

Sodium

99.

What is the chemical formula for water?

a)

H₂O

b)

H₂O₂

c)

KCl

d)

NaCl

100.

In the molecule 5ZnSO₄how many oxygen atoms are there?

a)

5

b)

10

c)

15

d)

20

101.

What does the 6 represent?

a)

atomic mass

b)

atomic number

c)

element name

d)

chemical symbol

102.

What does 12.011 represent?

a)

average atomic mass

b)

atomic number

c)

element name

d)

chemical symbol

103.

What does the C represent?

a)

atomic mass

b)

atomic number

c)

element name

d)

chemical symbol

104.

These are found on the Periodic Table.

a)

Compounds

b)

Elements

c)

Mixtures

105.

the basic structural unit of matter

a)

atom

b)

matter

c)

element

d)

nucleus

106.

a collection of atoms of one type that cannot be broken down into simpler substances by ordinary chemical or physical means

a)

element

b)

subatomic particle

c)

electron

d)

matter

107.

a subatomic particle, contained in the nucleus of an atom, having the same mass as a proton but no electrical charge

a)

proton

b)

neutron

c)

electron

d)

matter

108.

a negatively charged subatomic particle that orbits the nucleus of an atom

a)

proton

b)

neutron

c)

electron

d)

matter

109.

a unique number for each element that equals the number of protons in an atom of that element

a)

element name

b)

element symbol

c)

atomic number

d)

atomic mass

110.

the mass of an atom, calculated by adding the number of protons and neutrons in the nucleus of the atom

a)

element name

b)

element symbol

c)

atomic number

d)

atomic mass

111.

The atomic number of this pictured element is

a)

28

b)

58.6934

c)

Ni

d)

Nickel

112.

What is the average atomic mass of Neon?

a)

10

b)

30

c)

10.18

d)

20.18

113.

How many protons are in this element?

a)

79

b)

196

c)

117

d)

Cannot be determined

114.

Symbol for atomic number 28

a)

Si

b)

Ni

c)

Ti

d)

Li

115.

Tm average atomic mass

a)

98

b)

144.908

c)

168.934

d)

222

116.

Indium average atomic mass

a)

114.818

b)

112.412

c)

126.904

d)

49

117.

Bromine atomic number

a)

79.904

b)

35.453

c)

53

d)

35

118.

Element with greatest atomic number

a)

Darmstadtium

b)

Roentgenium

c)

Hydrogen

d)

Nobelium

119.

Symbol of average atomic mass 50.942

a)

Sn

b)

Y

c)

V

d)

He

120.

Element with 17 protons

a)

Oxygen

b)

Dubnium

c)

Curium

d)

Chlorine

121.

Element name of isotope shown

a)

hydrogen

b)

helium

c)

lithium

d)

berilium

122.

Gold element symbol

a)

Go

b)

Ag

c)

Ga

d)

Au

123.

What is the chemical symbol for the element hydrogen

a)

H

b)

He

c)

h

d)

he

124.

What is the chemical symbol for the element Silicon

a)

S

b)

Si

c)

si

d)

Sl

125.

What is the chemical symbol for the element Nitrogen

a)

Ni

b)

N

c)

No

d)

Nb

126.

The horizontal row on the periodic table is called a

a)

group

b)

family

c)

period

d)

atomic number

127.

A proton is....

a)

A negatively charged subatomic particle

b)

A positively charged subatomic particle

c)

A neutrally charged subatomic particle

d)

The only subatomic particle located in the nucleus

128.

The elements Li, Na, K, Rb, Cs and Fr belong to this family.

a)

alkali metals

b)

alkaline earth elements

c)

rare earth elements

d)

noble gases

129.

The elements Helium, Neon, Argon, Krypton, Xenon and Radon belong to this family.

a)

alkali metals

b)

alkaline earth elements

c)

transition elements

d)

noble gases

130.

Which element has similar properties as Chlorine?

a)

Na

b)

I

c)

No

d)

Y

131.

This gas has reacts violently and has only one valence electron.

a)

hydrogen

b)

helium

c)

neon

d)

krypton

132.

How many valence electrons do the alkali metals have?

a)

1

b)

2

c)

3

d)

8

133.

How many valence electrons do the alkaline earth elements have?

a)

1

b)

2

c)

3

d)

8

134.

How many valence electrons do the noble gases have?

a)

1

b)

2

c)

3

d)

8

135.

How many valence electrons do the halogens (F, Cl, Br, I, At) have?

a)

1

b)

5

c)

6

d)

7

136.

How many valence electrons do the chalcogens (O, S, Se, Te, Po) have?

a)

1

b)

5

c)

6

d)

7

137.

How many valence electrons do the pnictogen family (N, P, As, Sb, Bi) have?

a)

1

b)

5

c)

6

d)

7

138.

This element is a metalloid.

a)

Selenium

b)

Mercury

c)

Silicon

d)

Europium

139.

This element is a metal.

a)

Hydrogen

b)

Francium

c)

Antimony

d)

Radon

140.

This element is a non-metal.

a)

Lithium

b)

Polonium

c)

Osmium

d)

Sulfur

Chemistry Molecule number of atoms

Total questions: 140

Worksheet time: 2hrs 46mins

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