Nuclear Physics Exam||Newest Exam
Questions And Correct
Answers||Graded A+
The half-life of iodine-131 is 8 days. Chan Hee examines two samples of iodine-131.
Sample 1: 10 g
Sample 2: 20 g
What can Chan Hee expect to observe about the samples after 16 days? -CORRECT
ANSWER Three-fourths of each sample will have undergone radioactive decay.
The graph shows all of the stable isotopes of elements according to the numbers of
protons and neutrons in their nuclei.
Which statements are supported by the graph? Check all that apply. -CORRECT
ANSWER 1. For large atoms, more neutrons than
2. protons are needed to be stable.
Nuclei that have 90 or greater protons are always radioactive.
The table lists several radioisotopes that have technological uses.
Which radioisotope would be used by both archaeologists and botanists (scientists who
study plants)? -CORRECT ANSWER carbon-14
What is the half-life of a radioisotope? -CORRECT ANSWER the time needed for half of
a sample of radioisotope to decay
Which is not a form of ionizing radiation? -CORRECT ANSWER infrared light
Which characteristics of a radioisotope make it useful for diagnosing medical problems?
-CORRECT ANSWER a short half-life and it is taken up by a specific part of the body
Which change occurs when an atom undergoes alpha decay? -CORRECT ANSWER
The nucleus loses mass and a new element is produced.
Calcium-51 has a half-life of 4.5 days. Only 0.75 gram remains of a sample that was
initially 12 grams.
How old is the sample of calcium-51? -CORRECT ANSWER 18 days
The half-life of cobalt-60 is 5 years. How old is a sample of cobalt-60 if only one-eighth
of the original sample is still cobalt-60? -CORRECT ANSWER 15 Years
, What did the accident at the nuclear power plant in Chernobyl in 1986 demonstrate
about the use of nuclear power that had not been previously demonstrated? -
CORRECT ANSWER Large areas can be contaminated with radiation.
Gertrude writes a short story in which the main character must enter a nuclear-powered
spaceship's engine room that has lost its shielding in order to prevent the engine from
flooding the rest of the ship with radiation. The main character is not wearing protective
gear.
What effects are best for Gertrude to consider when planning what may happen to the
character? -CORRECT ANSWER non-stochastic effects such as severe burns and
radiation sickness resulting from the short-term, high-level exposure
The emission of light from a radioisotope occurs during ___ decay. -CORRECT
ANSWER gamma
Which equation represents mass-energy equivalence? -CORRECT ANSWER e=mc^2
What is the energy equivalent of an object with a mass of 2.5 kg? -CORRECT
ANSWER 2.25 * 10^17
Carla sees an equation that models a nuclear change.
Which nuclear process does the equation illustrate? -CORRECT ANSWER nuclear
fusion, because the equation shows two hydrogen nuclei combining to form a helium
nucleus
What are the starting materials for nuclear fission? -CORRECT ANSWER a neutron
and a large nucleus
The nuclear equation is incomplete.
What particle completes the equation? -CORRECT ANSWER 138
54 XE
Which are advantages of using nuclear reactors to generate electricity? Check all that
apply. -CORRECT ANSWER 2,4,5
Nuclear power has a high output.
Nuclear power is readily available.
Nuclear power produces relatively low carbon dioxide emissions.
How are nuclear reactions used to meet the world's energy needs? -CORRECT
ANSWER Fission reactors are used to generate electricity, but fusion is not yet practical
enough to be used.
Questions And Correct
Answers||Graded A+
The half-life of iodine-131 is 8 days. Chan Hee examines two samples of iodine-131.
Sample 1: 10 g
Sample 2: 20 g
What can Chan Hee expect to observe about the samples after 16 days? -CORRECT
ANSWER Three-fourths of each sample will have undergone radioactive decay.
The graph shows all of the stable isotopes of elements according to the numbers of
protons and neutrons in their nuclei.
Which statements are supported by the graph? Check all that apply. -CORRECT
ANSWER 1. For large atoms, more neutrons than
2. protons are needed to be stable.
Nuclei that have 90 or greater protons are always radioactive.
The table lists several radioisotopes that have technological uses.
Which radioisotope would be used by both archaeologists and botanists (scientists who
study plants)? -CORRECT ANSWER carbon-14
What is the half-life of a radioisotope? -CORRECT ANSWER the time needed for half of
a sample of radioisotope to decay
Which is not a form of ionizing radiation? -CORRECT ANSWER infrared light
Which characteristics of a radioisotope make it useful for diagnosing medical problems?
-CORRECT ANSWER a short half-life and it is taken up by a specific part of the body
Which change occurs when an atom undergoes alpha decay? -CORRECT ANSWER
The nucleus loses mass and a new element is produced.
Calcium-51 has a half-life of 4.5 days. Only 0.75 gram remains of a sample that was
initially 12 grams.
How old is the sample of calcium-51? -CORRECT ANSWER 18 days
The half-life of cobalt-60 is 5 years. How old is a sample of cobalt-60 if only one-eighth
of the original sample is still cobalt-60? -CORRECT ANSWER 15 Years
, What did the accident at the nuclear power plant in Chernobyl in 1986 demonstrate
about the use of nuclear power that had not been previously demonstrated? -
CORRECT ANSWER Large areas can be contaminated with radiation.
Gertrude writes a short story in which the main character must enter a nuclear-powered
spaceship's engine room that has lost its shielding in order to prevent the engine from
flooding the rest of the ship with radiation. The main character is not wearing protective
gear.
What effects are best for Gertrude to consider when planning what may happen to the
character? -CORRECT ANSWER non-stochastic effects such as severe burns and
radiation sickness resulting from the short-term, high-level exposure
The emission of light from a radioisotope occurs during ___ decay. -CORRECT
ANSWER gamma
Which equation represents mass-energy equivalence? -CORRECT ANSWER e=mc^2
What is the energy equivalent of an object with a mass of 2.5 kg? -CORRECT
ANSWER 2.25 * 10^17
Carla sees an equation that models a nuclear change.
Which nuclear process does the equation illustrate? -CORRECT ANSWER nuclear
fusion, because the equation shows two hydrogen nuclei combining to form a helium
nucleus
What are the starting materials for nuclear fission? -CORRECT ANSWER a neutron
and a large nucleus
The nuclear equation is incomplete.
What particle completes the equation? -CORRECT ANSWER 138
54 XE
Which are advantages of using nuclear reactors to generate electricity? Check all that
apply. -CORRECT ANSWER 2,4,5
Nuclear power has a high output.
Nuclear power is readily available.
Nuclear power produces relatively low carbon dioxide emissions.
How are nuclear reactions used to meet the world's energy needs? -CORRECT
ANSWER Fission reactors are used to generate electricity, but fusion is not yet practical
enough to be used.
