Nuclear Chemistry Exam||Latest Exam
Questions And Correct Verified
Answers||Graded A+
If an unshielded sample of radioactive material emits alpha particles, what effect will it
have on a person sitting in the next room? (Assume the wall between rooms is
composed of concrete.) -CORRECT ANSWER None, because the wall will block the
radiation.
In which isotope is the strong nuclear force not strong enough to balance electrostatic
forces between protons? -CORRECT ANSWER uranium-238
A radioactive nuclide that is used for radiation therapy for cancer has 33 neutrons and a
mass number of 60. Which is the correct symbol for this nuclide? -CORRECT ANSWER
60 27 Co
A stable atom that has a large nucleus most likely contains -CORRECT ANSWER more
neutrons than protons.
Which particles that make up an atom are involved in nuclear reactions? -CORRECT
ANSWER protons and neutrons
Which type of reaction does this diagram represent?
mc008-1.jpg -CORRECT ANSWER a chain reaction that is caused by nuclear fission
The atomic symbol mc025-1.jpg represents potassium-40 (K-40), a radioactive isotope
that has 19 protons and 21 neutrons. Which atomic symbol could represent an isotope
that results from the decay of K-40?
40 19 K -CORRECT ANSWER 40 18 Ar
A large atom decays and emits a particle. After the reaction is complete, the atom's
mass has changed substantially. What kind of particle has most likely been emitted? -
CORRECT ANSWER alpha particle
The alpha decay of a radioactive nuclide (X) emits a He-4 nucleus and produces an
isotope of mc013-1.jpg. What is X?
235 92 U -CORRECT ANSWER 239 94 Pu
, Which represents the balanced nuclear equation for the beta plus decay of C-11? -
CORRECT ANSWER mc019-1.jpg
11 6 C ---> 11 5 B + 0 +1 e
After a radioactive atom decays, it is the same element that it was before with no
measurable change in mass. Which kind of decay has occurred, and how do you know?
-CORRECT ANSWER gamma decay because photons have no mass
Which best describes what forms in nuclear fission? -CORRECT ANSWER two smaller,
more stable nuclei
Consider the nuclear equation below.
mc030-1.jpg
Which is the missing value that will balance the equation? -CORRECT ANSWER 84
A student writes the following statements about the relationship between mass defect
and nuclear binding energy.
1. When an isotope's protons and neutrons come together to form a nuclide, a small
amount of mass is converted to energy.
2. An equivalent amount of energy must be added to the nuclide to split apart its protons
and neutrons.
3. Statement 1 describes the isotope's nuclear binding energy, and statement 2
describes the isotope's mass defect.
Which statement is correct? -CORRECT ANSWER 1 and 2 only
Consider the three equations below.
mc017-1.jpg
mc017-2.jpg
mc017-3.jpg
Which statement do these reactions best support? -CORRECT ANSWER Nuclear
fusion plays an important role in making elements that are heavier than helium.
Involves combining of nuclei -CORRECT ANSWER nuclear fusion
Produces dangerous radioactive waste -CORRECT ANSWER nuclear fission
Have high activation energies -CORRECT ANSWER nuclear fusion
Releases large amounts of energy -CORRECT ANSWER both
Questions And Correct Verified
Answers||Graded A+
If an unshielded sample of radioactive material emits alpha particles, what effect will it
have on a person sitting in the next room? (Assume the wall between rooms is
composed of concrete.) -CORRECT ANSWER None, because the wall will block the
radiation.
In which isotope is the strong nuclear force not strong enough to balance electrostatic
forces between protons? -CORRECT ANSWER uranium-238
A radioactive nuclide that is used for radiation therapy for cancer has 33 neutrons and a
mass number of 60. Which is the correct symbol for this nuclide? -CORRECT ANSWER
60 27 Co
A stable atom that has a large nucleus most likely contains -CORRECT ANSWER more
neutrons than protons.
Which particles that make up an atom are involved in nuclear reactions? -CORRECT
ANSWER protons and neutrons
Which type of reaction does this diagram represent?
mc008-1.jpg -CORRECT ANSWER a chain reaction that is caused by nuclear fission
The atomic symbol mc025-1.jpg represents potassium-40 (K-40), a radioactive isotope
that has 19 protons and 21 neutrons. Which atomic symbol could represent an isotope
that results from the decay of K-40?
40 19 K -CORRECT ANSWER 40 18 Ar
A large atom decays and emits a particle. After the reaction is complete, the atom's
mass has changed substantially. What kind of particle has most likely been emitted? -
CORRECT ANSWER alpha particle
The alpha decay of a radioactive nuclide (X) emits a He-4 nucleus and produces an
isotope of mc013-1.jpg. What is X?
235 92 U -CORRECT ANSWER 239 94 Pu
, Which represents the balanced nuclear equation for the beta plus decay of C-11? -
CORRECT ANSWER mc019-1.jpg
11 6 C ---> 11 5 B + 0 +1 e
After a radioactive atom decays, it is the same element that it was before with no
measurable change in mass. Which kind of decay has occurred, and how do you know?
-CORRECT ANSWER gamma decay because photons have no mass
Which best describes what forms in nuclear fission? -CORRECT ANSWER two smaller,
more stable nuclei
Consider the nuclear equation below.
mc030-1.jpg
Which is the missing value that will balance the equation? -CORRECT ANSWER 84
A student writes the following statements about the relationship between mass defect
and nuclear binding energy.
1. When an isotope's protons and neutrons come together to form a nuclide, a small
amount of mass is converted to energy.
2. An equivalent amount of energy must be added to the nuclide to split apart its protons
and neutrons.
3. Statement 1 describes the isotope's nuclear binding energy, and statement 2
describes the isotope's mass defect.
Which statement is correct? -CORRECT ANSWER 1 and 2 only
Consider the three equations below.
mc017-1.jpg
mc017-2.jpg
mc017-3.jpg
Which statement do these reactions best support? -CORRECT ANSWER Nuclear
fusion plays an important role in making elements that are heavier than helium.
Involves combining of nuclei -CORRECT ANSWER nuclear fusion
Produces dangerous radioactive waste -CORRECT ANSWER nuclear fission
Have high activation energies -CORRECT ANSWER nuclear fusion
Releases large amounts of energy -CORRECT ANSWER both
