1. No category

Individual Feedback Report for:
St#: 1141027
Test: Ch 7 CHEM Testscorepart1
Grade: B
Score: 83.33 % (25.00 of 30.00)
181. Which of the following symbols completes the decay equation below?
Au →
Hg + ?
β
A.
B.
γ
C.
α
D.
n
182. Which of the following decay products will be repelled by a positively charged surface?
A. an alpha particle
B. a beta particle
C. a gamma ray
D. a neutron
191. Carbon-14 is radioactive, while its daughter nucleus nitrogen-14 is stable. This fact
suggests that the instability of the carbon-14 nucleus may result from:
A. too many protons relative to neutrons in the nucleus
B. too much mass in the nucleus
C. too many electrons relative to protons in the nucleus
D. oo many neutrons relative to protons in the nucleus
199. Assuming the masses of the starting materials are the same, approximately how much
more energy is available from a nuclear fusion reaction than from the most energetic
chemical reaction?
A. approximately one thousand times more energy
B. approximately one million times more energy
C. approximately one-hundred million times more energy
D. approximately one billion times more energy
200. The bombs dropped on Hiroshima and Nagasaki in early August 1945 were examples
of:
A. controlled fission chain reactions
B. uncontrolled fission chain reactions
C. controlled fusion chain reactions
D. uncontrolled fusion chain reactions
Page 1 of 1
May 15, 201512:39:06 PM
Individual Feedback Report for:
St#: 1232138
Test: Ch 7 CHEM Testscorepart1
Grade: C+
Score: 70.00 % (21.00 of 30.00)
176. Considering the fact that the mass of a proton is approximately 1840 times the mass of
an electron, which of the following is true?
A. A beta particle is more than 7000 times the mass of an alpha particle.
B. An alpha particle is almost 4000 times the mass of a beta particle.
C. A beta particle is almost 4000 times the mass of an alpha particle.
D. An alpha particle is more than 7000 times the mass of a beta particle.
178. Consider the below illustration representing a nuclear decay event:
I.
II.
III.
The mass is the same as the parent nucleus’s mass.
The mass is less than the parent nucleus’s mass.
The atomic number is lower than the parent nucleus’s atomic
number.
IV. The atomic number is higher than the parent nucleus’s atomic
number.
Which two of the following statements about the nature of the daughter nucleus are
true?
A. I. and III.
B. I. and IV.
C. II. and III.
D. II. and IV.
Page 1 of 3
May 15, 201512:39:06 PM
Individual Feedback Report for:
St#: 1232138
181. Which of the following symbols completes the decay equation below?
Au →
Hg + ?
β
A.
B.
γ
C.
α
D.
n
185. What percentage of carbon-14 will be left in a fossilized organism if the organism died
approximately 29 000 years ago?
A. 1.56 percent
B. 3.12 percent
C. 6.25 percent
D. 12.5 percent
186. Which of the following isotope pairs is likely to have a daughter-to-parent ratio of 3 to 1
after approximately 1.5 billion years?
Parent
Daughter
a. thorium-235
lead-206
b. rubidium-87
strontium-87
c. potassium-40
argon-40
d. uranium-235
lead-207
A.
B.
C.
D.
a
b
c
d
191. Carbon-14 is radioactive, while its daughter nucleus nitrogen-14 is stable. This fact
suggests that the instability of the carbon-14 nucleus may result from:
A. too many protons relative to neutrons in the nucleus
B. too much mass in the nucleus
C. too many electrons relative to protons in the nucleus
D. oo many neutrons relative to protons in the nucleus
Page 2 of 3
Individual Feedback Report for:
St#: 1232138
196. Which of the following correctly compare nuclear fission to nuclear fusion?
I.
Nuclear fission is easier to initiate than nuclear fusion.
II.
Nuclear fission releases much more energy than nuclear fusion.
III. Nuclear fission is not employed in bombs, but nuclear fusion is.
IV. Nuclear fission reactors are the only type of reactors operating at
present.
A.
B.
C.
D.
I. and II. only
I. and III. only
I. and IV. only
I., II., and IV. only
198. The majority of the energy released from a hydrogen bomb results from:
A. a controlled fission chain reaction
B. an uncontrolled fission chain reaction
C. a controlled fusion chain reaction
D. an uncontrolled fusion chain reaction
199. Assuming the masses of the starting materials are the same, approximately how much
more energy is available from a nuclear fusion reaction than from the most energetic
chemical reaction?
A. approximately one thousand times more energy
B. approximately one million times more energy
C. approximately one-hundred million times more energy
D. approximately one billion times more energy
Page 3 of 3
Individual Feedback Report for:
St#: 704181
Test: Ch 7 CHEM Testscorepart1
Grade: B
Score: 83.33 % (25.00 of 30.00)
175. After a radioactive nucleus has decayed via beta emission, the daughter nucleus has:
A. both a mass number and an atomic number decreased by two
B. a mass number decreased by four, and an atomic number decreased by two
C. a mass number that is unchanged, and an atomic number increased by one
D. an atomic number decreased by four, and a mass number decreased by two
176. Considering the fact that the mass of a proton is approximately 1840 times the mass of
an electron, which of the following is true?
A. An alpha particle is more than 7000 times the mass of a beta particle.
B. A beta particle is almost 4000 times the mass of an alpha particle.
C. An alpha particle is almost 4000 times the mass of a beta particle.
D. A beta particle is more than 7000 times the mass of an alpha particle.
177. What nucleus will be formed when
Po first undergoes alpha decay and then the
daughter nucleus formed from that decay undergoes beta decay?
Tl
A.
B.
Pb
C.
At
D.
Bi
180. Which of the following correctly lists the types of emissions from slowest to fastest?
Slowest →
Fastest
a. α
β
γ
b. α
γ
β
c. σ
α
γ
d. γ
β
α
A.
B.
C.
D.
b
c
d
a
Page 1 of 2
May 15, 201512:39:06 PM
Individual Feedback Report for:
St#: 704181
Use the following information to answer the next 2 questions.
On April 26, 1986, an explosion at the nuclear power plant at Chernobyl in Ukraine released
the greatest quantity of radioactive material ever associated with an industrial accident. One
of the principal radioisotopes released was iodine-131, which has a half-life of 8 days.
Iodine-131 decays via beta emission.
187. The daughter nucleus resulting from the decay of iodine-131 is:
A. indium-128
B. xenon-131
C. tellurium-129
D. antimony-127
Page 2 of 2
Individual Feedback Report for:
St#: 704433
Test: Ch 7 CHEM Testscorepart1
Grade: A
Score: 90.00 % (27.00 of 30.00)
178. Consider the below illustration representing a nuclear decay event:
I.
II.
III.
The mass is the same as the parent nucleus’s mass.
The mass is less than the parent nucleus’s mass.
The atomic number is lower than the parent nucleus’s atomic
number.
IV. The atomic number is higher than the parent nucleus’s atomic
number.
Which two of the following statements about the nature of the daughter nucleus are
true?
A. I. and IV.
B. II. and III.
C. II. and IV.
D. I. and III.
181. Which of the following symbols completes the decay equation below?
Au →
A.
α
B.
γ
C.
n
D.
Page 1 of 2
Hg + ?
β
May 15, 201512:39:06 PM
Individual Feedback Report for:
St#: 704433
199. Assuming the masses of the starting materials are the same, approximately how much
more energy is available from a nuclear fusion reaction than from the most energetic
chemical reaction?
A. approximately one million times more energy
B. approximately one-hundred million times more energy
C. approximately one billion times more energy
D. approximately one thousand times more energy
Page 2 of 2
Individual Feedback Report for:
St#: 704833
Test: Ch 7 CHEM Testscorepart1
Grade: B
Score: 76.67 % (23.00 of 30.00)
181. Which of the following symbols completes the decay equation below?
Au →
A.
α
B.
γ
C.
n
D.
Hg + ?
β
Use the following decay curve for strontium-90 to answer the next 1 questions.
189. What mass of strontium-90 will exist in 150 years if you began with 100.0 g today?
A. 12.5 g
B. 6.25 g
C. 3.12 g
D. 25.0 g
Page 1 of 3
May 15, 201512:39:06 PM
Individual Feedback Report for:
St#: 704833
Use the following information and graph to answer the next 1 questions.
A hypothetical radioisotope decays via beta emission to a stable isotope in one step. The
decay curve for this is shown below.
190. What mass of the parent isotope remains after 25 days?
A. 12.5 g
B. 6.25 g
C. 50.0 g
D. 25.0 g
193. To initiate a uranium fission reaction in a nuclear reactor, uranium-235 nuclei must
absorb:
A. beta particles
B. neutrons
C. gamma rays
D. alpha particles
Page 2 of 3
Individual Feedback Report for:
St#: 704833
197. Consider the following nuclear equation:
He + ? ? He + 2 H
Which of the following represents the missing particle?
A. He
B.
H
C.
He
D.
H
198. The majority of the energy released from a hydrogen bomb results from:
A. an uncontrolled fission chain reaction
B. a controlled fusion chain reaction
C. a controlled fission chain reaction
D. an uncontrolled fusion chain reaction
200. The bombs dropped on Hiroshima and Nagasaki in early August 1945 were examples
of:
A. controlled fusion chain reactions
B. uncontrolled fission chain reactions
C. uncontrolled fusion chain reactions
D. controlled fission chain reactions
Page 3 of 3
Individual Feedback Report for:
St#: 705215
Test: Ch 7 CHEM Testscorepart1
Grade: B
Score: 73.33 % (22.00 of 30.00)
172. Consider the following two isotopes of uranium:
U and
U
Which of the following is true?
A. One of the isotopes has 143 protons, and the other has 146 protons.
B. One of the isotopes has 235 neutrons, and the other has 238 neutrons.
C. One of the isotopes has a mass of 327, and the other has a mass of 330.
D. One of the isotopes has 143 neutrons, and the other has 146 neutrons.
178. Consider the below illustration representing a nuclear decay event:
I.
II.
III.
The mass is the same as the parent nucleus’s mass.
The mass is less than the parent nucleus’s mass.
The atomic number is lower than the parent nucleus’s atomic
number.
IV. The atomic number is higher than the parent nucleus’s atomic
number.
Which two of the following statements about the nature of the daughter nucleus are
true?
A. I. and IV.
B. II. and III.
C. II. and IV.
D. I. and III.
Page 1 of 3
May 15, 201512:39:07 PM
Individual Feedback Report for:
St#: 705215
181. Which of the following symbols completes the decay equation below?
Au →
A.
α
B.
γ
C.
n
D.
Hg + ?
β
184. The half-life of plutonium-242 is about 400 000 years. How long would it take for a 10.0
g sample of this radioisotope to decay to 1.25 g?
A. 1 600 000 years
B. 1 200 000 years
C. 2 000 000 years
D. 800 000 years
Use the following information to answer the next 2 questions.
On April 26, 1986, an explosion at the nuclear power plant at Chernobyl in Ukraine released
the greatest quantity of radioactive material ever associated with an industrial accident. One
of the principal radioisotopes released was iodine-131, which has a half-life of 8 days.
Iodine-131 decays via beta emission.
188. The official account of the Chernobyl accident estimates the total amount of iodine-131
released to be between 80 and 400 g. If measurements taken 40 days after the
accident indicated that a total of 10 g of iodine-131 remained, what mass of this
radioisotope was originally released?
A. 320 g
B. 160 g
C. 120 g
D. 80 g
Page 2 of 3
Individual Feedback Report for:
St#: 705215
Use the following decay curve for strontium-90 to answer the next 1 questions.
189. What mass of strontium-90 will exist in 150 years if you began with 100.0 g today?
A. 12.5 g
B. 6.25 g
C. 3.12 g
D. 25.0 g
191. Carbon-14 is radioactive, while its daughter nucleus nitrogen-14 is stable. This fact
suggests that the instability of the carbon-14 nucleus may result from:
A. too much mass in the nucleus
B. too many electrons relative to protons in the nucleus
C. oo many neutrons relative to protons in the nucleus
D. too many protons relative to neutrons in the nucleus
198. The majority of the energy released from a hydrogen bomb results from:
A. an uncontrolled fission chain reaction
B. a controlled fusion chain reaction
C. a controlled fission chain reaction
D. an uncontrolled fusion chain reaction
Page 3 of 3
Individual Feedback Report for:
St#: 705289
Test: Ch 7 CHEM Testscorepart1
Grade: B
Score: 83.33 % (25.00 of 30.00)
177. What nucleus will be formed when
Po first undergoes alpha decay and then the
daughter nucleus formed from that decay undergoes beta decay?
Tl
A.
B.
Bi
C.
Pb
D.
At
178. Consider the below illustration representing a nuclear decay event:
I.
II.
III.
The mass is the same as the parent nucleus’s mass.
The mass is less than the parent nucleus’s mass.
The atomic number is lower than the parent nucleus’s atomic
number.
IV. The atomic number is higher than the parent nucleus’s atomic
number.
Which two of the following statements about the nature of the daughter nucleus are
true?
A. I. and III.
B. I. and IV.
C. II. and III.
D. II. and IV.
Page 1 of 2
May 15, 201512:39:07 PM
Individual Feedback Report for:
St#: 705289
181. Which of the following symbols completes the decay equation below?
Au →
Hg + ?
β
A.
B.
γ
C.
α
D.
n
Use the following decay curve for strontium-90 to answer the next 1 questions.
189. What mass of strontium-90 will exist in 150 years if you began with 100.0 g today?
A. 25.0 g
B. 12.5 g
C. 6.25 g
D. 3.12 g
199. Assuming the masses of the starting materials are the same, approximately how much
more energy is available from a nuclear fusion reaction than from the most energetic
chemical reaction?
A. approximately one thousand times more energy
B. approximately one million times more energy
C. approximately one-hundred million times more energy
D. approximately one billion times more energy
Page 2 of 2
Individual Feedback Report for:
St#: 768315
Test: Ch 7 CHEM Testscorepart1
Grade: C
Score: 60.00 % (18.00 of 30.00)
176. Considering the fact that the mass of a proton is approximately 1840 times the mass of
an electron, which of the following is true?
A. A beta particle is more than 7000 times the mass of an alpha particle.
B. An alpha particle is almost 4000 times the mass of a beta particle.
C. A beta particle is almost 4000 times the mass of an alpha particle.
D. An alpha particle is more than 7000 times the mass of a beta particle.
180. Which of the following correctly lists the types of emissions from slowest to fastest?
Slowest →
Fastest
a. α
β
γ
b. α
γ
β
c. σ
α
γ
d. γ
β
α
A.
B.
C.
D.
a
b
c
d
181. Which of the following symbols completes the decay equation below?
Au →
Hg + ?
β
A.
B.
γ
C.
α
D.
n
Page 1 of 4
May 15, 201512:39:07 PM
Individual Feedback Report for:
St#: 768315
186. Which of the following isotope pairs is likely to have a daughter-to-parent ratio of 3 to 1
after approximately 1.5 billion years?
Parent
Daughter
a. thorium-235
lead-206
b. rubidium-87
strontium-87
c. potassium-40
argon-40
d. uranium-235
lead-207
A.
B.
C.
D.
a
b
c
d
Use the following information to answer the next 2 questions.
On April 26, 1986, an explosion at the nuclear power plant at Chernobyl in Ukraine released
the greatest quantity of radioactive material ever associated with an industrial accident. One
of the principal radioisotopes released was iodine-131, which has a half-life of 8 days.
Iodine-131 decays via beta emission.
188. The official account of the Chernobyl accident estimates the total amount of iodine-131
released to be between 80 and 400 g. If measurements taken 40 days after the
accident indicated that a total of 10 g of iodine-131 remained, what mass of this
radioisotope was originally released?
A. 80 g
B. 120 g
C. 160 g
D. 320 g
191. Carbon-14 is radioactive, while its daughter nucleus nitrogen-14 is stable. This fact
suggests that the instability of the carbon-14 nucleus may result from:
A. too many protons relative to neutrons in the nucleus
B. too much mass in the nucleus
C. too many electrons relative to protons in the nucleus
D. oo many neutrons relative to protons in the nucleus
193. To initiate a uranium fission reaction in a nuclear reactor, uranium-235 nuclei must
absorb:
A. alpha particles
B. beta particles
C. gamma rays
D. neutrons
Page 2 of 4
Individual Feedback Report for:
St#: 768315
194. When uranium-235 undergoes fission, a number of possible fission products can
result. The following represents one possible fission result:
n+
U→
Kr + ? + 3 n + energy
Which of the following represents the missing daughter nucleus?
Cs
A.
B.
Mo
C.
Ba
D.
Nd
195. Which of the following represents a nuclear fission reaction?
U + n → Kr + Ba + 3 n + energy
A.
B.
H + H → He + n + energy
C.
U→
D.
Fe +
Th + He + energy
e→
Mn + energy
196. Which of the following correctly compare nuclear fission to nuclear fusion?
I.
Nuclear fission is easier to initiate than nuclear fusion.
II.
Nuclear fission releases much more energy than nuclear fusion.
III. Nuclear fission is not employed in bombs, but nuclear fusion is.
IV. Nuclear fission reactors are the only type of reactors operating at
present.
A.
B.
C.
D.
I. and II. only
I. and III. only
I. and IV. only
I., II., and IV. only
198. The majority of the energy released from a hydrogen bomb results from:
A. a controlled fission chain reaction
B. an uncontrolled fission chain reaction
C. a controlled fusion chain reaction
D. an uncontrolled fusion chain reaction
Page 3 of 4
Individual Feedback Report for:
St#: 768315
199. Assuming the masses of the starting materials are the same, approximately how much
more energy is available from a nuclear fusion reaction than from the most energetic
chemical reaction?
A. approximately one thousand times more energy
B. approximately one million times more energy
C. approximately one-hundred million times more energy
D. approximately one billion times more energy
Page 4 of 4
Individual Feedback Report for:
St#: 924223
Test: Ch 7 CHEM Testscorepart1
Grade: B
Score: 83.33 % (25.00 of 30.00)
173. Which of the following applies to isotopes of an element?
I.
They have the same number of
protons.
II. They have the same number of
neutrons.
III. They have the same number of
electrons.
IV. They have the same atomic number.
V. They have the same mass number.
A.
B.
C.
D.
I., II., and III. only
I., III., and IV. only
II., III., and IV. only
III., IV., and V. only
176. Considering the fact that the mass of a proton is approximately 1840 times the mass of
an electron, which of the following is true?
A. A beta particle is more than 7000 times the mass of an alpha particle.
B. An alpha particle is almost 4000 times the mass of a beta particle.
C. A beta particle is almost 4000 times the mass of an alpha particle.
D. An alpha particle is more than 7000 times the mass of a beta particle.
181. Which of the following symbols completes the decay equation below?
Au →
Hg + ?
β
A.
B.
γ
C.
α
D.
n
198. The majority of the energy released from a hydrogen bomb results from:
A. a controlled fission chain reaction
B. an uncontrolled fission chain reaction
C. a controlled fusion chain reaction
D. an uncontrolled fusion chain reaction
Page 1 of 2
May 15, 201512:39:08 PM
Individual Feedback Report for:
St#: 924223
199. Assuming the masses of the starting materials are the same, approximately how much
more energy is available from a nuclear fusion reaction than from the most energetic
chemical reaction?
A. approximately one thousand times more energy
B. approximately one million times more energy
C. approximately one-hundred million times more energy
D. approximately one billion times more energy
Page 2 of 2
Individual Feedback Report for:
St#: 975834
Test: Ch 7 CHEM Testscorepart1
Grade: B
Score: 83.33 % (25.00 of 30.00)
181. Which of the following symbols completes the decay equation below?
Au →
Hg + ?
β
A.
B.
γ
C.
α
D.
n
191. Carbon-14 is radioactive, while its daughter nucleus nitrogen-14 is stable. This fact
suggests that the instability of the carbon-14 nucleus may result from:
A. too many protons relative to neutrons in the nucleus
B. too much mass in the nucleus
C. too many electrons relative to protons in the nucleus
D. oo many neutrons relative to protons in the nucleus
193. To initiate a uranium fission reaction in a nuclear reactor, uranium-235 nuclei must
absorb:
A. alpha particles
B. beta particles
C. gamma rays
D. neutrons
197. Consider the following nuclear equation:
He + ? ? He + 2 H
Which of the following represents the missing particle?
A. H
B.
He
C.
H
D.
He
Page 1 of 2
May 15, 201512:39:08 PM
Individual Feedback Report for:
St#: 975834
198. The majority of the energy released from a hydrogen bomb results from:
A. a controlled fission chain reaction
B. an uncontrolled fission chain reaction
C. a controlled fusion chain reaction
D. an uncontrolled fusion chain reaction
Page 2 of 2