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H.Molar Mass & Atomic Structure

Total questions: 130

Worksheet time: 4hrs 42mins

Name
Class
Date
1.

What is the molar mass of Cl2?

a)

17 g/mol

b)

35.5 g/mo;

c)

71.0 g/mol

d)

89 g/mol

2.

What id the molar mass of UF6?

a)

101 g/mol

b)

238 g/mol

c)

257 g/mol

d)

352 g/mol

3.

Calculate the molar mass of KOH.

a)

28 g/mol

b)

56 g/mol

c)

84 g/mol

d)

112 g/mol

4.

Calculate the molar mass of CO2.

a)

14 g/mol

b)

28 g/mol

c)

36 g/mol

d)

44 g/mol

5.

Calculate the molar mass of Ba(C2H3O2)2

a)

255.3 g/mol

b)

237.3 g/mol

c)

228.3 g/mol

d)

196.3 g/mol

6.

Calculate the molar mass of Cu2O.

a)

37 g/mol

b)

45 g/mol

c)

79.5 g/mol

d)

143 g/mol

7.

Calculate the molar mass for Al(OH)3

a)

78.0 g/mol

b)

72 g/mol

c)

28 g/mol

d)

25 g/mol

8.

Find the Molar Mass of Ca(NO3)2



(a)  

9.
Molar mass is in units of ________.
a)
grams
b)
grams/mole
c)
mole
d)
moles/gram
10.
What is the mass of one mole of aluminum?
a)
27 g
b)
13 g
c)
54 g
d)
14 g
11.

What is the correct molar mass for Mg(OH)2?

(a)  

12.

What is the Total Molar mass of CH4?

(a)  

13.

What is the Total Molar mass of tricarbon octahydride?

(a)  

14.

What is the Total Molar mass of C6H8O6?

(a)  

15.

What is the Total Molar mass of NH3?

(a)  

16.

What is the Total Molar mass of CO2?

(a)  

17.

What is the Total Molar mass of sulfur dioxide?

(a)  

18.

What is the Total Molar mass of NaCl?

(a)  

19.

What is the Total Molar mass of CaCl2?

(a)  

20.

What is the Total Molar mass of C6H12O6?

(a)  

21.

What is the Total Molar mass of HCl?

(a)  

22.

What is the Total Molar mass of aluminum sulfate?

(a)  

23.

What is the Total Molar mass of C14H18N20O5 ?

(a)  

24.

Whats the molar mass of Ga2(SO3)3?

a)

187.1 grams per mole

b)

289.0 grams per mole

c)

467.4 grams per mole

d)

379.7 grams per mole

25.

What is the molar mass of C6H14?

a)

81 grams per mole

b)

92 grams per mole

c)

86 grams per mole

d)

76 grams per mole

26.

What is the molar mass of silver nitrate?

a)

100 grams per mole

b)

169.9 grams per mole

c)

59.9 grams per mole

d)

30 grams per mole

27.

What is the molar mass of Pb(Cr2O7)2 ?

a)

639.2 grams per mole

b)

456.90 grams per mole

c)

456 grams per mole

d)

234 grams per mole

28.

What is the molar mass of NaBr ?

a)

102.9 grams per mole

b)

02.9 grams per mole

c)

100.9 grams per mole

d)

105.9 grams per mole

29.

What is the molar mass of Zn(C2H3O2)2 ?

a)

150.89 grams per mole

b)

200.02 grams per mole

c)

183.5 grams per mole

d)

50.90 grams per mole

30.

What is the molar mass of (NH4)2S ?

a)

23.8 grams per mole

b)

68.1 grams per mole

c)

92.82 grams per mole

d)

324.82 grams per mole

31.

What is the molar mass of KMnO4?

a)

122.21 grams per mole

b)

128 grams per mole

c)

189.32 grams per mole

d)

158.04 grams per mole

32.

What is the molar mass of magnesium?

a)

54.94 g/mol

b)

1 g/mol

c)

40.08 g/mol

d)

24.31 g/mol

33.

Copper (II) sulfide, CuS, has a molar mass of...

a)

95.7

b)

128

c)

159.3

d)

191.4

34.

What is the molar mass of Fe3(PO4)2

a)

824 g/mol

b)

358 g/mol

c)

456 g/mol

d)

86 g/mol

35.

What is the molar mass of lead(II) sulfate?

a)

303.3 g/mol

b)

295.8 g/mol

c)

164.1 g/mol

d)

606.6 g/mol

36.

who discovered the electron

a)

Dalton

b)

J.J Thomson

c)

Lavoisier

d)

Rutherford

37.

What is the charge of a proton?

a)

Negative

b)

Positive

c)

Neutral

38.

What particle number is equal to the atomic number Z

a)

Protons

b)

Electrons

c)

Neutrons

39.

What is the charge of a neutron?

a)

Negative

b)

Positive

c)

Neutral

40.

Why the "Atomic Mass" on the periodic Table is different than the "Mass Number" of an Atom? (may be multiple answers)

a)

It is the average mass of all the isotopes

b)

Because atoms can have different masses

c)

I have no Idea

d)

All answers are correct

41.

Subatomic particles with a negative charge

a)

Electrons

b)

Neutrons

c)

Protons

d)

Quarks

42.
Subatomic particles with a positive charge
a)
neutrons
b)
atomic mass
c)
protons
d)
isotopes
43.
Measure mainly of the nuclear particles: protons + neutrons
a)
Subatomic Particles
b)
Atomic Number
c)
Atomic Mass
d)
Gluons
44.
Subatomic particles that are neutral in charge
a)
Neutrons
b)
Protons
c)
Nucleus 
d)
Electrons
45.

Atoms of the same element with a different number of neutrons

a)

Ion

b)

alloy

c)

Isotope

d)

Quarks

46.
A charged atom
a)
Ion
b)
Isotope
c)
Electron Cloud
d)
Quark
47.
Where electrons are likely to be found as they travel around the nucleus
a)
Nucleus
b)
Electron Cloud
c)
Within a Proton
d)
Within a Neutron
48.
A tiny but very dense, positively charged portion of the atom that holds most of the atomic mass
a)
Electron Shells
b)
Orbitals
c)
Electron Cloud
d)
Nucleus
49.
Arrangement of elements organized by atomic number
a)
Electron Cloud 
b)
Periodic Table 
c)
Electron Configuration
d)
None of these
50.

Calculation used to find the number of neutrons in an atom

a)

Mass Number- Atomic Number

b)

Atomic Number - Mass Number

c)

Mass Number - Electrons

d)

protons = electrons = neutrons

51.
How many neutrons does a sodium atom have? (Use the image to help you)
a)
23
b)
11
c)
12
d)
34
52.
Atoms of the same element must always have the same number of _________
a)
electrons
b)
neutrons
c)
isotopes
d)
protons
53.

The __________ of an atom is the sum of the protons and neutrons in the nucleus of that atom.

a)

mass number

b)

atomic number

c)

ionic charge

d)

isotope weight

54.

The mass number of helium (He) is (a)   ?

55.

Using a periodic table (you can use the one in the textbook) order the following elements by mass number, least to greatest.

a)

Hydrogen

b)

Boron

c)

Gallium

d)

Thallium

e)

Radon

1)
2)
3)
4)
5)
56.

Using a periodic table (you can use the one in the textbook) order the following elements by # of valence electrons, least to greatest.

a)

Potassium

b)

Barium

c)

Carbon

d)

Oxygen

e)

Neon

1)
2)
3)
4)
5)
57.

How many protons does indium have?

a)

49

b)

66

c)

114

d)

115

58.
Where is most of the mass in an atom located?
a)
in the nucleus
b)
in the protons
c)
in the neutrons
d)
in the electrons
59.
An element with a mass number of 11 and an atomic number of 5 has how many neutrons?
a)
11
b)
5
c)
6
d)
16
60.
The atomic number of an element that has 9 protons, 9 electrons, and 10 neutrons is _____.
a)
9
b)
10
c)
19
d)
28
61.

An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.

a)

20

b)

10

c)

35

d)

25

62.

What does the 6 represent?

a)

Atomic mass

b)

atomic number

c)

chemical symbol

d)

element name

63.
What does the C represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol 
64.
In order for an atom to be neutral what has to be true?
a)
The atom has more protons than neutrons
b)
The atom has more neutrons than protons
c)
The atom has the same number of protons and neutrons
d)
The atom has the same number of protons and electrons
65.
Which two subatomic particles make up the nucleus of an atom?
a)
Protons and Electrons
b)
Neutrons and Electrons
c)
Electrons and Protons
d)
Protons and Neutrons
66.

What word did Democritus come up with?

a)

electron

b)

proton

c)

neutron

d)

atom

67.

What did Rutherford discover about atoms?

a)

An atom is always negatively charged.

b)

An atom is mostly empty space, but has a dense positively charged center(nucleus).

c)

An atom is always positively charged.

d)

All particles will pass straight through gold foil with no change in path.

68.

Who proposed a model with electrons moving in specific orbitals?

a)

Dalton

b)

Rutherford

c)

Bohr

d)

Thomson

69.

What does atom mean?

a)

small

b)

visible

c)

indivisible

d)

particle

70.

Who discovered the neutron?

a)

Joseph Thomson

b)

Ernest Rutherford

c)

Niels Bohr

d)

James Chadwick

71.
Niels Bohr suggested that electrons.......
a)
are found in specific orbits
b)
electrons are scattered throughout the atom
c)
electrons move according to their energy level
d)
electrons are positive
72.
According to Chadwick, what does the nucleus of an atom contain?
a)
Electrons and neutrons
b)
Protons and neutrons
c)
Neutrinos and positrons
d)
DNA and RN
73.
True or False: The majority of an atom is made up of empty space
a)
True
b)
False
74.
Subatomic particle that has a negative charge and is located outside of the nucleus.
a)
Electron
b)
Proton
c)
Neutron
d)
Voltron
75.
All matter is made of what?
a)
Energy 
b)
Atoms 
c)
Electrons 
d)
Compounds 
76.
Who stated that all atoms of the same element are exactly alike?
a)
Democritus
b)
Dalton
c)
Thomson
d)
Borh
77.
Rutherford's gold foil experiment provided evidence that...
a)
Negative and positive charges are spread evenly throughout the atom.
b)
Alpha particles have a positive charge.
c)
Gold is not a dense as previously thought.
d)
There is a dense positively charged nucleus at the center of an atom.
78.
Some atoms are large enough to see with your eyes.
a)
True
b)
False
79.
The first person to propose a theory about an atom was
a)
Democritus
b)
Rutherford
c)
Dalton
d)
Aristotle
80.
What is the atomic number of this atom?
a)
2
b)
4
c)
6
d)
none of the above
81.

How many Valance Electrons does the following element have?

(a)  

82.

What is the Identity of this element

(a)  

83.
An element with five valence electrons is
a)
phosphorus
b)
oxygen
c)
beryllium
d)
rubidium
84.

How many electrons can go in the first energy level?

a)

2

b)

8

c)

18

d)

32

85.

What is the the outermost shell with electrons?

a)

Shells

b)

Isotope

c)

Orbit

d)

Valence

86.

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

a)

2

b)

6

c)

8

d)

16

87.

What element is represented in this Bohr Model?

a)

Carbon

b)

Hydrogen

c)

Aluminum

d)

Lithium

88.
What is the name of this element?
a)
Lithium
b)
Boron
c)
Carbon
d)
Neon
89.
This is a correct dot diagram for fluorine (F)
a)
true
b)
false
90.

Which Bohr model represents Be?

a)
b)
c)
d)
91.

How many electrons does this element have?

a)

12

b)

11

c)

13

d)

10

92.
What element is this?
a)
Boron
b)
Carbon
c)
Nitrogen
d)
Lithium
93.

Which Bohr model represents Oxygen?

a)
b)
c)
d)
94.

What element is represented in this Bohr Model?

a)

Carbon

b)

Hydrogen

c)

Aluminum

d)

Lithium

95.
What is the mass number of this atom?
a)
1
b)
3
c)
4
d)
7
96.

What element is this?

a)

Argon

b)

Fluorine

c)

Beryllium

d)

Potassium

97.

What element is this?

a)

Magnesium

b)

Carbon

98.

Remember to use your Periodic Table of Elements to help you identify which Bohr Model is pictured...

a)

carbon

b)

potassium

c)

nitrogen

d)

iron

99.

Remember to use your Periodic Table of Elements to help you identify which Bohr Model is pictured...

a)

beryllium

b)

magnesium

c)

lithium

d)

sodium

100.

Identify which Bohr Model is pictured...

a)

oxygen

b)

lithium

c)

sodium

d)

potassium

101.

What element is this?

a)

P

b)

F

c)

B

d)

Mg

102.

Which Bohr model represents Sodium?

a)
b)
c)
d)
103.

Which Element is this?

a)

Neon (Ne)

b)

Calcium (Ca)

c)

Potassium (K)

d)

Yttrium (Y)

104.

The period number is equal to

a)

The number of energy levels

b)

The number of electrons

c)

the number of protons

d)

The number of valence electrons

105.

Which group includes highly reactive non-metals with seven electrons in their outer shell?

a)

Alkai Metals (group 1)

b)

Alkaline Metals (group 2)

c)

Halogens (group 17)

d)

Noble Gases (group 18)

106.

Which group includes metals with two electrons in their outer shell?

a)

Alkai Metals (group 1)

b)

Alkaline Metals (group 2)

c)

Halogens (group 17)

d)

Noble Gases (group 18)

107.
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
108.

Which group includes non-reactive gasses that have a full outer electron shell?

a)

Alkai Metals

b)

Alkaline Metals

c)

Halogens

d)

Noble Gases

109.

Which group includes soft, highly reactive metals with one electron in their outer shell?

a)

Alkai metals (group 1)

b)

Alkaline metals (group 2)

c)

Halogens (group 17)

d)

Noble gasses (group 18)

110.

How many valence electrons?

a)

2

b)

3

c)

4

d)

5

111.

What is the maximum number of electrons that can be found in the first shell (energy level)?

a)

2

b)

8

c)

18

112.
Which is an electron?
a)
A
b)
B
c)
C
113.

How many valence electrons does Tin (Sn) have?

a)

8

b)

7

c)

5

d)

4

114.

Which of these is incorrect?

a)
b)
115.

Which of these is correct?

a)
b)
c)
116.
This could be the dot diagram of 
a)
Ne
b)
Si
c)
Al
d)
Be
117.

For the highlighted group, there are _​ valence electrons



(a)  

118.

For the highlighted group, there are _​ valence electrons



(a)  

119.

For the highlighted group, there are _​ valence electrons



(a)  

120.

For the highlighted group, there are _​ valence electrons



(a)  

121.

For the highlighted group, there are _​ valence electrons



(a)  

122.

For the highlighted group, there are _​ valence electrons



(a)  

123.

For the highlighted group, there are _​ valence electrons



(a)  

124.

In order for an atom to become stable, it requires:

a)

A full outer shell of valence electrons

b)

0 valence electrons

c)

1 valence electron

d)

4 valence electrons

125.

Electrons on the outermost shell that are involved in bonding and reactions are known as:

a)

Ground state electrons

b)

Electromagnetic electrons

c)

Valence electrons

126.

Based on VALENCE ELECTRONS, this could represent the outer ring of:

a)

Mg

b)

Cl

c)

C

d)

O

127.

Based on VALENCE ELECTRONS, which element would be in group 16?

a)

V

b)

W

c)

X

d)

Y

e)

Z

128.

The section labeled A is known as the?

(click image to englarge)

a)

Proton

b)

Neutron

c)

Nucleus

d)

Electron

129.

The section labeled D is known as the?

(click image to enlarge)

a)

Proton

b)

Neutron

c)

Nucleus

d)

Electron

130.

Is this correct way to draw the Lewis Dot Structure for Carbon?

a)

Yes

b)

No, too many electrons

c)

No, not enough electrons

d)

No, dots are in wrong places

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