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Semester Exam Retake

Total questions: 101

Worksheet time: 3hrs 22mins

Name
Class
Date
1.
A copper penny turning greenish after a few years is an example of ...
a)
Chemical Change
b)
Physical Change
2.
A change in which NEW substances are formed.
a)
Chemical change
b)
Physical change
c)
Casual change
d)
Formal change
3.
Which of the following IS a physical change?
a)
Getting a haircut
b)
Rusty metal
c)
sour milk
d)
A compound
4.
Is melting butter for popcorn a chemical or physical change?
a)
chemical
b)
physical
5.
Ripping up paper ...
a)
Chemical Change
b)
Physical Change
6.
Is a rusting bicycle a chemical or physical change?
a)
chemcial
b)
physical
7.
A change in phase ...
a)
Chemical Change
b)
Physical Change
8.
Bubbles form when two or more substances are combined ...
a)
Chemical Change
b)
Physical Change
9.
Change in size ...
a)
Chemical Change
b)
Physical Change
10.
An explosion occurs ...
a)
Chemical Change
b)
Physical Change
11.
Causes a change in temperature ...
a)
Chemical Reaction
b)
Physical Reaction
12.
Evidence of Chemical Change.
a)
New Substance 
b)
Size change
c)
State change
d)
Mixture 
13.
Physical properties are
a)
properties that can be observed without changing the identity of the substance
b)
properties that describe how a substance changes into a completely different substance
14.

Found in the nucleus of an atom. This particle has a positive charge.

a)

Neutron

b)

Proton

c)

Electron

d)

Decepticon

15.

Found orbiting outside the nucleus, this subatomic particle has a negative charge.

a)

Neutron

b)

Proton

c)

Electron

d)

Idontknowatron

16.

Found in the nucleus of an atom, this subatomic particle has a neutral (or no ) charge

a)

Neutron

b)

Proton

c)

Electron

d)

Whattheheckatron

17.

What is the atomic mass of barium

a)

56

b)

82

c)

137

d)

138

18.

How many protons does indium have?

a)

49

b)

66

c)

114

d)

115

19.

What is the difference between Co and CO?

a)

CO is an element but Co is a compound

b)

Nothing is different. They are the same thing.

c)

CO is two elements and Co is only one element

d)

Co is not a pure substance

20.

Which one is a compound?

a)

Ni

b)

F

c)

Re

d)

NaCl

21.

How many different elements are in the compound?

a)

12

b)

3

c)

24

d)

6

22.

"Na" is the element's

a)

Chemical Formula

b)

Compound

c)

Name

d)

Chemical Symbol

23.

How many elements are in this compound?

a)

13

b)

6

c)

4

d)

3

24.

Elements are broadly classified as metals, nonmetals, and _________________.

a)

compounds

b)

organic

c)

metalloids

d)

Metallica

25.

Valence electrons are found

a)

in the innermost energy level of an atom

b)

in the middle energy levels of an atom

c)

in the outermost energy levels of an atom

26.

An atom with 3 valence electrons "wants" a full shell, so it can either gain 5 or lose 3. Which is more likely to occur?

a)

Gain 5

b)

Lose 3

c)

Nothing

27.

Zinc fluoride

a)

ZnF2

b)

Zn2F

c)

ZnF

d)

Zn2F4

28.

How many Aluminum atoms are in Al2O3?

a)

3

b)

5

c)

2

d)

1

29.

When naming ionic compounds, the metal is always named first and the nonmetal is always named second.

a)

True

b)

False

30.

Write the correct formula for Sodium Chloride.

a)

SC

b)

SCl

c)

NaCl

d)

NaCl2

31.

Mg3N2

a)

Magnesium nitride

b)

Magnesium (II) nitride

c)

Trimagnesium dinitrogen

32.

How do covalent bonds form?

a)

By donating and receiving valence electrons between atoms.

b)

Scientists still aren't sure.

c)

Opposite slight charges attract each atom in the compound.

d)

Sharing valence electrons between atoms

33.

What two types of atoms make a covalent bond?

a)

2 Nonmetals

b)

1 Metal and 1 Nonmetal

c)

2 Metals

d)

2 Noble Gases

34.

How many valence electrons does hydrogen have?

a)

1

b)

2

c)

3

d)

4

35.

Covalent compounds can have

a)

Single Bonds

b)

Double Bonds

c)

Triple Bonds

d)

Quadruple Bonds

36.

When an atom loses an electron, it becomes a

a)

positive ion

b)

negative ion

c)

neutral ion

d)

neutral atom

37.

What is the proper name for CH4?

a)

Monocarbon hydride

b)

Carbon tetrahydride

c)

Monocarbon tetrahydride

38.

What is the proper name for S2O2?

a)

Sulfur oxide

b)

Sulfur dioxide

c)

Sulfur (II) oxide

d)

Disulfur dioxide

39.
Which statement best describes an element?
a)
made from mixture 
b)
thousands in the world
c)
pure, made of only one atom
d)
can be separated 
40.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
41.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
42.
What is the tiniest particle in the entire universe?
a)
cells
b)
gases
c)
atoms
d)
liquids
43.
What is the name of a single type of atom?
a)
cell
b)
proton
c)
element
d)
atom
44.
What is the term for combining 2 or more DIFFERENT atoms together?
a)
atoms
b)
elements
c)
molecules
d)
compounds
45.
a)
element
b)
compound
c)
mixture of elements
d)
mixture of compounds
46.
a)
element
b)
compound
c)
mixture of elements
d)
mixture of compounds
47.
a)
element
b)
compound
c)
mixture of elements and compounds
d)
mixture of compounds
48.
a)
element
b)
compound
c)
mixture of elements
d)
mixture of compounds and elements
49.
a)
element
b)
compound
c)
mixture of elements
d)
mixture of compounds
50.

Subatomic particles with a negative charge

a)

Electrons

b)

Neutrons

c)

Protons

d)

Quarks

51.
Most of the mass in an atom is made up of _____________________?
a)
protons and electrons
b)
protons and neutrons
c)
neutrons and electrons
d)
electrons and quarks
52.
Water is an element
a)
true
b)
false
53.
DIFFERENT kinds of atoms chemically combined to form a substance are
a)
Mixture
b)
Element
c)
Compound
d)
Substance
54.
The mass number of an isotope is equal to the number of ______ in an atom.
a)
Protons
b)
Neutrons
c)
Protons + Neutrons
d)
 Electrons
55.

Which subatomic particle determines the charge of an atom?

a)

protons

b)

neutrons

c)

electrons

56.

The law of _____ states that mass is neither created nor destroyed during chemical reactions or physical changes.

a)

multiple proportions

b)

definite proportions

c)

universal gravitation

d)

conservation of mass

57.
How many protons does an atom with an atomic number of 28 and a mass number of 40 have?
a)
28
b)
68
c)
12
d)
40
58.
The following element has _____________ electrons.
a)
114
b)
289
c)
175
d)
403
59.
The following picture represents which atomic model?
a)
Niels Bohr
b)
Democritus
c)
Schrodinger & Heisenberg
d)
JJ Thomson
60.

Vertical columns on the periodic table are called ___?

a)

groups

b)

periods

c)

rows

d)

families

61.

Which color on the image of the periodic table corresponds with the halogens.

a)

red

b)

black

c)

blue

d)

orange

62.

Which color on the image of the periodic table corresponds with the lanthanides.

a)

red

b)

black

c)

blue

d)

orange

63.

Which color on the image of the periodic table corresponds with the noble gases.

a)

red

b)

black

c)

blue

d)

orange

64.

Which color on the image of the periodic table corresponds with the transition metals.

a)

red

b)

black

c)

blue

d)

orange

65.

Which color on the image of the periodic table corresponds with the metalloids.

a)

bright yellow

b)

gold

c)

teal

d)

light blue

66.

Which color on the image of the periodic table corresponds with the alkaline earth metals.

a)

yellow

b)

dark yellow

c)

blue/green

d)

teal

67.

Horizontal rows on the periodic table are called ___?

a)

groups

b)

periods

c)

rows

d)

families

68.

Horizontal rows on the periodic table are called ___?

a)

groups

b)

periods

c)

rows

d)

families

69.

The periodic table is mostly comprised of what type of element?

a)

Metals

b)

Nonmetals

c)

Metalloids

70.

The electrons in the outermost shell (main energy level) of an atom; these are the electrons involved in forming bonds

a)

alkali metals (group 1)

b)

Halogens (Group 17)

c)

atomic number

d)

valence electrons

71.

symbols must have at least

a)

1 cap. letter

b)

2 cap. letters

c)

2 lower case letters

d)

any letter you want

72.

an arrangement of the elements according to their atomic numbers so that elements with similar properties are in the same column and properties repeat from row to row

a)

Periodic Table of Elements

b)

Atomic Theory

c)

Isotopes

d)

Subatomic Particles

73.
How many energy levels does an atom of Chlorine have?
a)
2
b)
3
c)
4
d)
7
74.

What happens to the atomic numbers as you move from left to right on the periodic table?

a)

Increase

b)

Decrease

c)

Stay the same

d)

Nothing

75.

Which element is located in group 3?

a)

Yttrium (Y)

b)

Carbon (C)

c)

Sodium (Na)

d)

Lithium (Li)

76.

Two elements that have similar physical and chemical properties are most likely in the same...

a)

period

b)

row

c)

group

77.

Which element is most likely to have six valence electrons?

a)

Barium (Ba)

b)

Carbon (C)

c)

Oxygen (O)

d)

Americium (Am)

78.

Which element is located in period 4 and group 5?

a)

Vanadium (V)

b)

Zirconium (Zr)

c)

Niobium (Nb)

d)

Titanium (Ti)

79.

Which element is most likely to have six electrons in its 4th energy level?

a)

Oxygen (O)

b)

Selenium (Se)

c)

Krypton (Kr)

d)

Potassium (K)

80.

What is the atomic mass of an element with 16 protons, 13 neutrons, and 16 electrons?

a)

13 amu

b)

16 amu

c)

29 amu

d)

45 amu

81.

How many neutrons are located in the nucleus of an atom that has 12 protons, 12 electrons, and an atomic mass of 28 amu?

a)

12

b)

16

c)

28

d)

40

82.

A chemical change is different than a physical change because in a chemical change

a)

chemicals are used

b)

molecules do not physically touch

c)

a new substance is formed and in a physical no new substance is formed

d)

the change can be seen but in a physical change it cannot

83.

Which of the following 2 are chemical reactions?

a)

sugar dissolving in water

b)

water turning into steam

c)

burning wood

d)

mixing baking soda and vinegar

e)

tearing paper

84.

How many Carbons are present on the reactant side?

a)

1

b)

2

c)

3

d)

4

85.

How many Hydrogens are on the product side of this chemical equation?

a)

1

b)

2

c)

3

d)

4

86.

Why are chemical equations always balanced? Select ALL that apply.

a)

Matter cannot be created.

b)

Matter cannot be destroyed.

c)

Matter can only be rearranged/conserved.

d)

Matter doesn't matter.

87.

Is this chemical equation balanced? Why or why not? Choose the BEST answer.

a)

Yes, the amount of atoms for each element are equal on both the reactant and product side.

b)

No, the carbons are not the same number on both the reactant and product side.

c)

No, neither the carbons or hydrogens are the same amount on both the reactant and product side.

d)

No, none of the elements (carbon, hydrogen, or oxygen) are the same amount on both the reactant and product side.

88.
a substance that is formed as the result of a chemical reaction
a)
Product 
b)
Reactant
c)
Starters
d)
Enders
89.
the starting materials in a chemical reaction
a)
Products
b)
Reactants
c)
Starters
d)
Enders
90.
an atom or molecule which has gained or lost one or more of its valence electrons
a)
Covalent Bond
b)
Chemical Formula
c)
Ion
d)
Compound
91.
bond in which one or more electrons from one atom are removed and attached to another atom, resulting in positive and negative ions which attract each other
a)
Covalent Bond
b)
Ionic Bond
c)
Reaction Bond
d)
Null Bond
92.
bond in which one or more pairs of electrons are shared by two atoms
a)
Covalent Bond
b)
Ionic Bond
c)
Reaction Bond
d)
Null Bond
93.
a chemical reaction that releases energy by light or heat
a)
Endothermic Reaction
b)
Exothermic Reaction
c)
Diffusion
d)
Fission
94.
In the reaction methane + oxygen turns into carbon dioxide + water, the methane and oxygen are called _______________.
a)
reactants
b)
products
c)
neutrals
d)
energizers
95.
The left side of the equation below is called
a)
Products
b)
Reactants
96.
The right side of the equation below is called the
a)
products
b)
reactants
97.
A chemical reaction that absorbs heat
a)
Single replacement
b)
Exothermic
c)
Endothermic
d)
Decomposition
98.
A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction.
a)
Coefficient
b)
reactant
c)
subscript
d)
product 
99.
Which of the following answers will balance the equation below?
__K + __Br2 --> __KBr
a)
2, 1, 1
b)
2, 3, 2
c)
2, 1, 2
d)
1, 2, 3
100.
If the reactants on the left side of a chemical equation are C₃H₈ + 5O₂, the products in a balanced equation could be
a)
4CO₂ + 3H₂O
b)
3CO₂ + 4H₂O
c)
2CO₂ + 3H₂O
d)
3CO + 4H₂O
101.
Which of the following options correctly balances the equation below?
__HNO2 + __O2 --> __HNO3
a)
4, 1, 4
b)
1, 2, 1
c)
1, 2, 1
d)
2, 1, 2

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