CHEMISTRY
Final Exam Practice
TRUE OR FALSE
1.
In a young star’s core, hydrogen undergoes fusion to produce Helium atoms
2.
The most dangerous type of radiation is gamma
3.
After 3 half-lives, 50% of a radioisotope will remain
4.
The atomic mass of an alpha particle is 4 a.m.u.’s
5.
By studying their line spectra, scientists know what elements are present in stars
6.
Radioisotopes decay because they are unstable
7.
Particle accelerators are also referred to as “atom crunchers.”
8.
a.m.u. stands for “atomic mass unit.”
9.
The symbol for an alpha particle is
10.
A photon is a “bundle” of light energy
11.
A radioisotope’s decay rate is described as its “half-time”
12.
A beta particle is a high speed neutron shot from the nucleus
13.
P orbitals are spherical
14.
D orbitals can hold up to 14 electrons
15.
Atomic masses given in the periodic table are an average of that atom’s isotopes
16.
Elements that exist as diatomics include oxygen, nitrogen and chlorine
17.
An electron weighs 1 a.m.u.
18.
The Chernobyl accident resulted in no deaths
19.
Chemical reactions involve only the nucleons
20.
Excited electrons will jump to a higher energy level known as their “ground state”
21.
The Lewis dot diagram represents an atom’s valence electrons.
22.
The mass of an electron is so tiny, we simply round its mass to 0 amu’s.
23.
Niels Bohr conducted his oil-drop experiment to reveal the charge on an electron.
24.
Electrons are represented by the Bohr Model in planet-like orbits around the nucleus.
25.
All transition metals make 2+ ions
26.
The bond between sodium and sulfur will be covalent
27.
Covalent compounds are also called salts
28.
Valence electrons are available for bonding with other atoms
2
α4
Select the BEST answer from the choices below
29.
A Megaton is equal to …
a.
one hundred tons
b.
one thousand tons
c.
one million tons
d.
one zillion tons
e.
washing-tons
30.
The first city ever to be attacked with a nuclear weapon was…
a.
Nagasaki
b.
Trinity
c.
Russia
d.
Hiroshima
e.
Japan
31.
The type of radioactive decay with the most mass is…
a.
gamma rays
b.
beta particles
c.
alpha particles
d.
neutrons
e.
cheesino rays
32.
Which of the following statements about chemical names or formulas is incorrect?
a.
Li(NO3)2 is lithium nitrate
b.
K2SO4 is dipotassium sulfate
c.
HCl2 is hydrochloric acid
d.
Al(MnO4)2 is aluminum permanganate ion
e.
All of the statements above are incorrect
33.
The true behavior of electrons surrounding an atom is best described by ….
a.
the Bohr model
b.
the Quantum Mechanical model
c.
comparing electrons to raisins in a pudding
d.
all of the above
e.
none of the above
34.
Nuclear power plants in America generate power by splitting large atoms. In
other words, they….
a.
produce energy by fusion reactions
b.
produce energy by chemical reactions
c.
produce energy by fission reactions
d.
all of the above
e.
none of the above
35.
Nucleons—even protons—are bound to each other by which force?
a.
gravitational force
b.
weak nuclear force
c.
strong nuclear force
d.
sticky-sticky force
e.
force of habit
36.
After radioactive decay occurs, the remaining material is referred to as…
a.
nuclear waste
b.
nuclear fission
c.
Trinity left-overs
d.
alpha decay
e.
decay products
37.
The correct formula for Ammonium sulfate is…
a.
NH4S
b.
NHSO
c.
NH4SO4
d.
NH2SO4
e.
none of the above
38.
a.
b.
c.
d.
e.
is taking place in the core of stars.
A war between the sun people
fission
fusion
all of the above
none of the above
39.
When an radioisotope decays in several steps, we call this a …
a.
nuclear fusion-fission reaction
b.
alpha decay series
c.
radioisotope reaction
d.
decay products
e.
decay series
40.
The difference between isotopes of an element is the number of…
a.
neutrons
b.
electrons
c.
protons
d.
nebulons
e.
beta decay particles
41.
Transmutation is…
a.
how electrons jump orbitals when excited
b.
when you operate a computer while in a moving vehicle
c.
another name for a chemical reaction or change
d.
when an element changes into another element due to radioactive decay
e.
all of the above
42.
AMU stands for
a.
America’s most unique
b.
allergy mucous units
c.
atom making university
d.
atomic mass unit
e.
none of the above
43.
If after 100 years only 25% of a radioisotope remains, its half-life must be….
a.
100 years
b.
50 years
c.
200 years
d.
not enough information to answer this question
e.
none of the above
44.
Particle accelerators make new elements by the process of …
a.
fusion
b.
fission
c.
radioactive decay
d.
gamma decay
e.
none of the above
45.
When an atom’s electrons gain energy, they may…
a.
jump to an orbital at the next highest energy level
b.
remain in their existing orbital if they don’t receive enough energy to jump
c.
jump to an orbital several energy levels higher
d.
all of the above
e.
none of the above
46
Which model of the atom helps us to understand the concept of energy
levels, but does not accurately describe the shape of atomic orbitals?
a.
The Rubens model
b.
The Bohr model
c.
The Orbital-configuration electronic whirly-gig model
d.
The Energy level model
e.
The Rutherford-Thompson model
47.
When an atom’s electrons are not in an excited state, but are at their
lowest possible energy levels, the atom is said to be in its…
a.
excited state
b.
unexcited state
c.
ground state
d.
resting-easy state
e.
relaxed state
48.
Electronegativity is the measure of…
a.
how many electrons fit around a nucleus.
b.
how much a student dislikes electrons.
c.
how much pull an atom has on it's own electrons
d.
how much pull an atom has on another atom's electrons
e.
all of the above
49.
Orbitals closer to the nucleus have a
than those further from the nucleus.
a.
higher
b.
lower
c.
identical
d.
variable
e.
all of the above
50.
A maximum of
electrons can occupy any sub-orbital, but they must have
a.
one, same
b.
two, opposite
c.
one, opposite
d.
two, same
e.
three, opposite
quantum energy level
spins.
51.
Down a column in the periodic table (i.e. from Na to Fr), atomic radius…
a.
increases
b.
decreases
c.
stays the same
d.
no regular pattern exists in atomic radius across periods
e.
the atomic radius of all atoms are the same—really tiny.
52.
An electron can become excited if it
a.
is heated
b.
absorbs energy
c.
absorbs radiation
d.
all of the above
e.
none of the above
53.
When returning to their ground state, electrons give off excess energy by emitting…
a.
photons
b.
a slightly foul odor
c.
gasses
d.
full spectrums
e.
none of the above
54.
The general formula for straight chain hydrocarbons (alkanes) is
a.
CnH2n + 1
b.
CnH2n
c.
CnH2n + 2
d.
CH4
e.
all of the above
Use the diagrams below to answer questions 55 – 60
55.
Which of the above is the Lewis Dot Diagram for
the alkali metals?
a.
diagram a.
b.
diagram b.
c
diagram c
d.
diagram d
e.
diagram e
56.
Which of the above is the Lewis Dot Diagram for the boron family?
a.
diagram a.
b.
diagram b.
c
diagram c
d.
diagram d
e.
diagram e
57.
Which of the above is the Lewis Dot Diagram for helium?
a.
diagram a.
b.
diagram b.
c
diagram c
d.
diagram d
e.
diagram e
…
58.
Which of the above is the Lewis Dot Diagram for the alkaline
earth metals?
a.
diagram a.
b.
diagram b.
c
diagram c
d.
diagram d
e.
diagram e
59.
Which of the above is the Lewis Dot Diagram for the carbon family?
a.
diagram a.
b.
diagram b.
c
diagram c
d.
diagram d
e.
diagram e
60.
The dots in the Lewis dot diagrams above represent…
a.
electrons in the outer orbitals
b.
electrons available for bonding
c
valence electrons
d.
all of the above
e.
none of the above
MATCH THE TERMS ON THE LEFT WITH THE DESCRIPTIONS ON THE RIGHT
59.
Quantum Mechanical Model
a. H, N, O, and the Halogens
60.
an atom that has lost or gained e-
b. ion
61.
electronegativity
c. probability clouds within energy levels
62.
base
d. OH- is the anion
63.
diatomics
e. an atom's pull on another atoms e-
64.
A polar covalent bond ....
a.
means that two atoms are sharing electrons
b.
two atoms share electrons unequally
c.
means that there is a slightly negative charge at one end of the compound
d.
means that there is a slightly positive charge at one end of the compound
e.
all of the above
65.
The number "2" in "O2" is called a...
a.
coefficient
b.
subscript
c.
superscript
d.
digital description digit
e.
dihydride
66.
Which of the following is the correct name for Fe2(SO4)
a.
iron sulfide
b.
iron sulfate
c.
iron (II) sulfide
d.
iron (III) sulfide
e.
none of the above
67.
The correct formula for Calcium bromide is…
a.
CaBr
b.
CaB
c.
CaBr2
d.
CBr
e.
none of the above
68.
Hydrobromic acid reacts with ammonium hydroxide to form water and ammonium bromide
a.
H2Br
+
Al(OH)3
AlBr3 + H2O
b.
HBr
+
Al(OH)3
AlBr3
+
H2O
c.
H2Br3
+
NH4OH
NH4Br3
+
H2O
d.
HBr
+
NH4OH
NH4Br
+
H2O
e.
none of the above
69.
The correct formula for Strontium sulfide is…
a.
SrS
b.
SrSO3
c.
SrS2
d.
Sr2SO4
e.
none of the above
70.
Nickel metal reacts with hydrochloric acid to form nickel (II) chloride and hydrogen gas
a.
Ni
+
HCl
NiCl2
b.
Ni2
+
HCl
NiCl
+
H2
c.
Ni2
+
HCl
NiCl
+
Cl2
d.
Ni
+
HCl2
NiCl2
e.
none of the above
+
+
71.
The correct formula for Aluminum permanganate is…
a.
Al(MnO4)3
b.
Al(MnO4)2
c.
AlMnO4
d.
AlMnO4
e.
none of the above
72.
Chromium metal reacts with oxygen to form dichromium trioxide
a.
Cr
+
O2
Cr2O3
73.
b.
Cr2
+
O2
Cr2O3
c.
Cr
+
O3
Cr2O3
d.
Cr2
+
O2
CrO3
a.
none of the above are correct
The correct formula for Ammonium sulfate is…
a.
NH4S
b.
NHSO
c.
NH4SO4
d.
NH2SO4
e.
none of the above
H2
H2
74.
75.
Sodium metal and water react to form sodium hydroxide and hydrogen gas
a.
Na
+
H2O
NaOH2
+
H2
b.
Na2
+
H2O
Na2OH
c.
Na
+
H2O
NaOH
d.
Na
+
H2O
NaO2H
e.
none of the above
+
+
+
H2
H2
H
Which of the following statements about chemical names or formulas is incorrect?
a.
Li(NO3)2 is lithium nitrate
b.
K2SO4 is dipotassium sulfate
c.
HCl2 is hydrochloric acid
d.
Al(MnO4)2 is aluminum permanganate ion
e.
All of the statements above are incorrect
76.
[Ne] 3s2 3p2 is the electron configuration for….
a.
Neon
b.
Carbon
c.
Silicon
d.
Oxygen
e.
none of the above
77.
[Ar] 3d5 4s2 is the electron configuration for….
a.
Moo goo gai pan
b.
Magnesium
c.
Magma
d.
Manganese
e.
none of the above
78.
Copper’s electron configuration is [Ar] 3d10 4s1. The [Ar] represents….
a.
the 18 electrons of the noble gas argon
b.
the 36 electrons of the noble gas argon
c.
the word “artificial,” because this element is man-made
d.
the element was discovered by a pirate who named it, “Arrrrr.”
e.
none of the above are correct
79.
Two Na ions will not form an ionic compound because…
a.
like charges attract
b.
like charges repel
c.
opposite charges attract
d.
opposite charges repel
e.
all of the above
80.
When naming monatomic anions,
a.
drop the ending and add “ate”
b.
drop the ending and add “ide”
c.
drop the ending and add “ous”
d.
drop the ending and add “ic”
e.
none of the above
+
MATCH THE TERMS ON THE LEFT WITH THE DESCRIPTIONS ON THE RIGHT
81.
CO32-
a. monatomic cation
82.
NH4+
b. monatomic anion
83.
3+
Al
c. polyatomic cation
84.
NH3
d. polyatomic anion
85.
3-
86.
N
e. molecule
235
92 U
+
1
236
on
92
142
U
60 Nd
+ 3 o1 n
+
The missing fission product is…
a.
Ge-94
b.
Ge-91
c.
U-94
d.
U-91
e.
none of the above
87.
244
94
Pu +
1
245
on
94
Pu
The missing fission product is…
a.
Rhodium-133
b.
Rhodium-135
c.
Plutonium-94
d.
Rhodium-45
e.
none of the above
88.
140
57
La
0
-1
β
+
The missing decay product is…
a.
Lanthanum-140
b.
Cerium-140
c.
Plutonium-94
d.
beta
e.
none of the above
89.
Mg3N2
a.
b.
c.
d.
e.
is called…
magnesium dinitride
trimagnesium dinitride
magnesium nitride
magnesium nitrate
none of the above
90.
CCl4 is called….
a.
carbon chlorine
b.
carbon chloride
c.
monocarbon tetrachloride
d.
carbon tetrachloride
e.
none of the above
110
49
In +
+ 2 o1 n
Match the compounds on the left with their description on the right
91.
O222+
a.
monatomic cation
92.
Ca
b.
monatomic anion
93.
O
2-
c.
polyatomic cation
94.
S8
d.
polyatomic anion
95.
NH4+
e.
covalently bonded molecule
96.
Sulfate ion
a.
S
97.
Sulfur
b.
S2-
98.
Sulfite ion
c.
Se2-
99.
Sulfide ion
d.
SO42-
100.
Selenide ion
e.
SO32-
101.
The half-life of U-231 is 4.2 days. If we started with 50 grams of
decay product will remain after 8.4 days?
a.
8.4 grams
b.
25 grams
c.
37.5 grams
d.
12.5 grams
e.
not enough information to determine answer
102.
Which of the following groups has the Lewis dot diagram seen here?
a.
alkali metals
b.
alkaline earth metals
c.
noble gasses
d.
the carbon family
e.
halogens
103.
Which of the following groups has the Lewis dot diagram seen here?
a.
alkali metals
b.
alkaline earth metals
c.
noble gasses
d.
the carbon family
e.
halogens
104.
Which of the following groups has the Lewis dot diagram seen here?
a.
alkali metals
b.
alkaline earth metals
c.
noble gasses
d.
the carbon family
e.
halogens
105.
Ba(OH)2 is called…
a.
barium dihydroxide
b.
barium oxide dihydride
c.
barium hydroxide
d.
barium dioxyhydride
e.
none of the above
231
U, how many grams of
106.
Li2CO3 is called…..
a.
dilithium carboxide
b.
lithium carboxide
c.
lithium tricarbonate
d.
dilithium tricarbonate
e.
none of the above
107.
Which of the following is the formula for sulfur hexafluoride?
a.
S5F
b.
SF
c.
S5F5
d.
SF5
e.
none of the above
108.
PbBr2
a.
b.
c.
d.
e.
117.
The molecule in problem number 108 above is…
a.
ionic
b.
covalent
c.
diatomic
d.
all of the above
e.
none of the above
118.
NCl3 is called….
a.
nitrogen chloride
b.
mononitrogen trichloride
c.
nitrogen trichloride
d.
trinitrogen chloride
e.
none of the above
119.
C3H8 is called….
a.
propane
b.
tricarbon octahydride
c.
one of the straight-chain alkanes
d.
all of the above
e.
none of the above
is called….
lead (II) bromide
lead (II) dibromide
lead bromine
lead dibromide
all of the above represent the same compound
120.
tend to form ionic bonds.
a.
b.
c.
d.
e.
121.
metals + non-metals
non-metals + non-metals
metals + metals
all of the above
none of the above
CaCl2 is called
a.
calcium dichloride since this compound is bonded covalently.
b.
calcium chloride since this is an ionic compound
c.
monocalcium dichloride since this is a covalent compound
d.
dichlorine chloride since this is an ionic compound
e.
not enough information
122.
The Lewis Dot diagram shows...
a.
all of an atom's electrons
b.
valence electrons
c.
neutrons available for bonding
d.
both b and c above
e.
both a and b above
123.
Look at the Lewis dot diagram to the right. The unknown element is a….
a.
halogen
b.
alkali metal
c.
alkaline earth metal
d.
noble gas
e.
none of the above
X
124.
Look at the Lewis dot diagram to the right. The unknown element is a….
a.
halogen
b.
alkali metal
c.
alkaline earth metal
d.
noble gas
e.
none of the above
X
125.
Which of the following statements about chemical names or formulas is incorrect?
a.
Li(NO3)2 is lithium nitrate
b.
K2SO4 is dipotassium sulfate
c.
HCl2 is hydrochloric acid
d.
Al(MnO4)2 is aluminum permanganate ion
e.
All of the statements above are incorrect
Match the item on the left with the descriptions on the right.
126.
O2-
a.
perioxide ion
127.
CO2
b.
dioxide
128.
CO
c.
an oxide anion
129.
O2
d.
Carbon monoxide
130.
O22-
e.
Carbon dioxide
Match the item on the left with the descriptions on the right.
131.
polyatomic
a.
made from several atoms
132.
anions
b.
ionic compounds
133.
cations
c.
negatively charged ions
134.
monatomic
d.
Made from one atom
135.
salts
e.
positively charged ions