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Chemistry- Final Exam Review

Total questions: 105

Worksheet time: 1hrs 15mins

Name
Class
Date
1.

same number of protons, different number of neutrons

a)

atomic number

b)

mass number

c)

isotope

d)

ion

2.

a charged atom

a)

neutral

b)

isotope

c)

ion

d)

nucleus

3.

atomic symbol

a)

capital letter

b)

lowercase letter

c)

2 capital letters

d)

2 lowercase leters

4.

mass number

a)

number of protons

b)

number of electrons

c)

number of protons and electrons

d)

number of protons and neutrons

5.

atomic number

a)

number of protons/stands for an element

b)

number of neutrons

c)

number of electrons

d)

number of protons and neutrons

6.

electrons

a)

no charge, nucleus

b)

positive charge, nucleus

c)

negative charge, shells

d)

negative charge, nucleus

7.

neutrons

a)

no charge, shells

b)

positive charge, nucleus

c)

neutral, no charge, nucleus

d)

negative charge, shells

8.

protons

a)

negative charge, nucleus

b)

positive charge, shells

c)

positive charge , nucleus

d)

neutral charge, nucleus

9.

What is the chemical symbol for carbon?

a)

C

b)

Ca

c)

Cn

d)

Crn

10.
How many neutrons does the isotope of lithium have?
a)
8
b)
3
c)
4
d)
5
11.
How many protons does this isotope of titanium have?
a)
48
b)
22
c)
26
d)
70
12.
How many neutrons does the isotope below have?     89 36Kr
a)
53
b)
36
c)
89
d)
125
13.
How many neutrons does an atom of the isotope Neon-22 have?
a)
12
b)
10
c)
22
d)
20
14.

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

a)

Protons

b)

Neutrons

c)

Electrons

d)

Mass

15.

Potassium-39 has how many neutrons?

a)

19

b)

18

c)

20

d)

21

16.

Nickel-59 has how many neutrons?

a)

30

b)

31

c)

32

d)

33

17.

Bromine-80 has how many neutrons?

a)

41

b)

42

c)

44

d)

45

18.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
19.
How many Oxygen are in H2O?
a)
1
b)
2
c)
0
d)
4
20.
How many O's are in Al₂(SO₄)₃
a)
4
b)
12
c)
7
d)
24
21.
Number of H in 3(NH₄)₂CrO₄
a)
4
b)
2
c)
8
d)
24
22.
How many atoms are there TOTAL in:
H2SO4
a)
6
b)
5
c)
7
d)
3
23.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
24.
a)

element

b)

compound

c)

mixture of elements and compounds

d)

mixture of compounds

e)

mixture of elements

25.
a)

element

b)

compound

c)

mixture of elements and compounds

d)

mixture of compounds

e)

mixture of elements

26.
a)

element

b)

compound

c)

mixture of elements and compounds

d)

mixture of compounds

e)

mixture of elements

27.
a)

element

b)

compound

c)

mixture of elements and compounds

d)

mixture of compounds

e)

mixture of elements

28.

How many of each type of atom are in the formula NH3?

a)

1 nitrogen, 3 helium

b)

1 neon, 3 hydrogen

c)

3 nitrogen, 3 hydrogen

d)

1 nitrogen, 3 hydrogen

29.

The number and type of atoms of reactants is equal to the number and type of atoms of products describes which of the following?

a)

Equal mass equation

b)

Unbalanced chemical equation

c)

Law of conservation of energy

d)

Balanced chemical equation

30.

Law of conservation of matter

a)

To maintain at a constant overall total

b)

A strong chemical bond that is formed when atoms share pairs of electrons

c)

The mass of all reactants must equal the mass of all products. Matter is neither created nor destroyed.

d)

The process by which one or more substances change to produce one or more different substances

31.

Covalent bond

a)

The energy that is stored in all compounds and potentially released in chemical reactions

b)

A strong chemical bond that is formed when atoms share pairs of electrons

c)

To maintain at a constant overall total

d)

The process by which one or more substances change to produce one or more different substances

32.

A student mixed baking soda and vinegar to test the law of conservation of mass. The student measured the mass before and after combining the substances. Which statement would they include in their conclusion to show evidence of the law of conservation of mass?

a)

Since a new substance was formed, it does not follow the law of conservation of mass.

b)

The mass of the substance after combining was less because gas was formed and has no mass.

c)

The substance remained a solid, so it follows the law of conservation of mass.

d)

The mass of the substance was equal before and after combining the baking soda and vinegar.

33.

Students want to gather evidence for the claim that the number of atoms present before a chemical reaction is equal to the number of atoms present after the chemical reaction. They decide to react vinegar and baking soda in a sealed plastic bag. Which of the following would provide the evidence the students need?

a)

The mass of the plastic bag, baking soda, and vinegar before the reaction was equal to the mass after the reaction.

b)

Bubbles were produced during the reaction, which meant that a gas was being produced.

c)

The plastic bag did not change in any way, indicating that it was not involved in the reaction.

d)

The mass of baking soda was exactly equal to the mass of the vinegar used to create the chemical reaction.

34.

Which of the following is true regarding the atoms involved in a chemical reaction?

a)

The same number of each type of atom will always be present before and after a chemical reaction takes place.

b)

Some of the atoms present before the reaction will always be lost during a chemical reaction.

c)

Some of the atoms will always be changed into a different type of atom by a chemical reaction.

d)

During a chemical reaction, atoms will always be combined into much larger molecules.

35.

The law of conservation of mass can be demonstrated by a chemical reaction. Which of the following models of a chemical reaction best represents the law of conservation of mass?

a)
b)
c)
d)
36.

During a chemical reaction, atoms ____________ to form new substances.

a)

Change

b)

Switch

c)

Turn into new atoms

d)

Rearrange

37.
The arrow in a chemical reaction is known as
a)
yield/produce
b)
mixture
c)
energy
d)
equals
38.

How many atoms does this chemical formula have?

a)

4

b)

2

c)

3

d)

1

39.

A subscript is

a)

the number of atoms that each element has in a chemical formula.

b)

at the pharmacy.

c)

the number of molecules.

d)

a compound.

40.

The number of electrons in an atom is equal to ......

a)

the number of protons

b)

the number of neutrons

c)

the atomic mass

41.

Which particle is responsible for chemical reactions?

a)

proton

b)

electron

c)

neutron

d)

no charge

42.

Find the mass of 11.37 mol of BaO. Round to the nearest whole number.

a)

1,354 g

b)

1,740 g

c)

17.40 g

d)

1,684 g

43.

Determine the amount of moles in CuBr that are in 276.9 g of the compound.

a)

3.2 mol

b)

1.7 mol

c)

2.1 mol

d)

1.9 mol

44.

Find the mass of 5.82 mol of MgCl2. Round to the nearest tenth.

a)

552.9 g

b)

436.8 g

c)

55.2 g

d)

555.9 g

45.

Determine the amount of moles of BaCl2 that are in 436 g of the compound.

a)

3.5 mol

b)

2.1 mol

c)

4.6 mol

d)

2.7 mol

46.

Find the mass of 3.8 mol of H2O. Round to the nearest tenth.

a)

57.9 g

b)

54.8 g

c)

68.4 g

d)

62.3 g

47.
What is the definition of molar mass?
a)
number of grams per one mole of a substance
b)
whole number ratio that is a multiple of a chemical formula
c)
simplest, whole number ratio of a chemical formula
d)
6.02 x 10^23 particles per one mole of a substance
48.
Molar mass is in units of ________.
a)
grams
b)
grams/mole
c)
mole
d)
moles/gram
49.
What is the molar mass of AuCl3?
a)
96 g
b)
130 g
c)
232.5 g
d)
303.3 g
50.
What is the definition for Avogadro's number?
a)
number of grams per one mole of a substance
b)
whole number ratio that is a multiple of a chemical formula
c)
simplest, whole number ratio of a chemical formula
d)
6.02 x 10^23 particles per one mole of a substance
51.
How many moles are present in 32.3 grams of carbon dioxide (CO2)?
a)
44.01 moles
b)
1421.52 moles
c)
32.3 moles
d)
0.73 moles
52.
What is the mass in grams of 5.90 mol C8H18?
a)
.0512 g
b)
19.4 g
c)
673 g
d)
389 g
53.
What is the name of this element?
a)
Helium
b)
Hydrogen
c)
Argon
d)
Silver
54.

What element is represented in this Bohr Model?

a)

Carbon

b)

Hydrogen

c)

Aluminum

d)

Lithium

55.
What is the name of this element?
a)
Lithium
b)
Boron
c)
Carbon
d)
Neon
56.

Electron live in something called __________.

a)

nucleus

b)

orbits

c)

Shells or Energy levels

d)

Valences

57.

How many electrons can go in the first energy level?

a)

2

b)

8

c)

18

d)

32

58.

What is a Lewis Dot Structure?

a)

It shows all of the particles in the atom.

b)

Contains protons and neutrons

c)

Only shows the element symbol and it's outer most electron shell

d)

Contains protons and electrons

59.

What is a drawing of an atom that shows all of the par;cles?

a)

Lewis Dot Model

b)

Dalton Model

c)

Thompson Model

d)

Bohr Model

60.

What is the the outermost shell with electrons?

a)

Shells

b)

Isotope

c)

Orbit

d)

Valence

61.

What is the atom called when there is adding or removing electrons creates atoms with (+) or (-) charges?

a)

isotopes

b)

ions

c)

neutral

d)

stable

62.

What is the chart called where all the elements are organized?

a)

Periodic Table

b)

Valence Chart

c)

Bohr Chart

d)

Lewis Chart

63.

What is the drawing of an atom that only has the symbol and the valence electrons?

a)

Lewis Dot Diagram

b)

Bohr Diagram

c)

Thompson Diagram

d)

Dalton Diagram

64.

Each column of the Periodic Table are known by this number

a)

Period

b)

Group

c)

Family

d)

Transition Metals

65.

What is an isotope?

a)

changing the number of neutrons; same atom with different weights.

b)

adding or removing electrons creates atoms with (+) or (-) charges

c)

par;cle inside nucleus, does not have a charge

d)

resists changing, stays the same

66.

Cations are...

a)

Positive

b)

Negative

c)

Neutral

67.

Anions are...

a)

Positive

b)

Negative

c)

Neutral

68.

A neutral atom of Magnesium (shown in image) will...

a)

Lose 2 electrons when it becomes an ion

b)

Gain 2 electrons when it becomes an ion

c)

Gain 6 electrons when it becomes an ion

d)

Lose 1 electron when it becomes an ion

69.

Think fast! An element has 25 protons and 22 electrons. It has a charge of...

a)

3+

b)

3-

c)

2+

d)

1-

70.
How many neutrons does B (Boron) contain?
a)
5
b)
11
c)
6
d)
10.811
71.
Which would be the BEST tool to measure the length of a pencil?
a)
inch ruler
b)
yard stick
c)
meter stick
72.
What is measured with a graduated cylinder?
a)
Passage of time
b)
Distance from one thing to another
c)
Weight of an object
d)
Volume of liquid
73.
What kind of glassware is pictured here?
a)
Flask
b)
Graduated Cylinder
c)
Beaker
d)
Pipette
74.
What kind of glassware is pictured here?
a)
Beaker
b)
Flask
c)
Pipette
d)
Graduated Cylinder
75.
What kind of glassware is pictured here?
a)
Pipette
b)
Flask
c)
Beaker
d)
Graduated Cylinder
76.

What is the name of this tool?

a)

Triple Beam Balance

b)

Electronic Scale

c)

Food Scale

d)

Spring Scale

77.
Which of the following is a unit of mass?
a)
kilogram
b)
liter
c)
meter
d)
pound
78.
A change where one or more new substances are created.
a)
Physical Change 
b)
Chemical Change 
79.
Is melting butter for popcorn a chemical or physical change?
a)
chemical
b)
physical
80.
Is bending copper wire a physical or chemical change?
a)
Physical
b)
Chemical
81.
Frank has a paper clip. It has a mass of 9g and a volume of 3cm3. What is its density?
a)
3 g/cm3
b)
1/3 g/cm3
c)
27 g/cm3
d)
39 g/cm3
82.

Which is the ONE variable that is changed on purpose?

a)

independent

b)

dependent

c)

controlled/constant

d)

no variables are changed on purpose

83.

Identify all of the examples of possible experimental errors. Click ALL that apply.

a)

uncalibrated tools

b)

incorrect use of tool for readings

c)

rounding measurements up or down

d)

lack of precision in reading measurements

84.

The attendance for the basketball game was estimated to be 15,000 people but 12,500 people attended. What was the percent error?

a)

16.67%

b)

20%

c)

2500%

d)

80%

85.

How close a measurement is to the accepted value is called:

a)

Accuracy

b)

Precision

c)

Error

86.

This targeting shows:

a)
High Accuracy & High Precision
b)
High Accuracy & Low Precision
c)
Low Accuracy & High Precision
d)
Low Accuracy & Low Precision
87.

What is the basic unit of liquid volume in the metric system?

a)

gram

b)

meter

c)

Liter

d)

cm3

88.

What is the basic unit of length in the metric system?

a)

gram

b)

meter

c)

Liter

d)

cm3

89.

What is the basic unit of mass in the metric system?

a)

gram

b)

meter

c)

Liter

d)

cm3

90.

What tool measures liquid volume?

a)

graduated cylinder

b)

metric ruler

c)

triple-beam balance

d)

thermometer

91.

What tool measures length?

a)

graduated cylinder

b)

metric ruler

c)

triple-beam balance

d)

thermometer

92.

What is the measurement on the graduated cylinder shown?

a)

10.9 mL

b)

20 mL

c)

19 mL

d)

18 mL

93.

What is the measurement on the triple-beam balance shown?

a)

335g

b)

35g

c)

3.5g

d)

305g

94.

What is the measurement on the triple-beam balance shown?

a)

27g

b)

28g

c)

27.7g

d)

2.7g

95.
How many significant figures does the following number have?
0.00345
a)
6
b)
5
c)
3
d)
Ambiguous: 3,4,5, or 6
96.
How many significant figures does the following number have: 0.00204
a)
6
b)
4
c)
3
d)
2
97.
Round 1289 to three significant figures
a)
1290
b)
130
c)
1300
d)
1.29x103
98.
What is 98.907 rounded to 1 significant figure?
a)
98.9
b)
90
c)
100
d)
1x102
99.
How would you write 0.0005 in scientific notation?
a)
50 x 105
b)
5 x 10-4
c)
5 x 103
d)
0.5 x 103
100.
What is 78.5 rounded to one significant figure?
a)
79
b)
78.5
c)
70
d)
80
101.
Calculate 1.23 m x 0.89 m and give your answer with the appropriate number of significant figures.
a)
1.0 m2
b)
1.1 m2
c)
1.0947 m2
d)
1.09 m2
102.
Round 1047.78 to three sig figs
a)
104
b)
105
c)
1050
d)
1050.00
103.
How many Significant Figures in the number below?
4.56 x 103
a)
5
b)
4
c)
6
d)
3
104.
Calculate 12.34 + 1.234 + 0.1234
a)
13.6974
b)
13.697
c)
13.70
d)
13.7
105.
Solve & Round to Correct Sig Figs.
4.5 x 2.34 = 
a)
11
b)
10.52
c)
10.5
d)
10

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