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Constructed Response . Topic 12: Nuclear Chemistry
Set D: Nuclear reaction equation, mass defect, nuclear energy
Base your answers to questions 7 through 9 on the nuclear equation shown below.
1
142
91
1
235 U + n ------ > Ba + Kr + 3 n + energy
92 0 56 36 0
7. State the type of nuclear reaction represented 7.
by the equation.
8. The sum of the masses of the products is slightly 8.
less than the sum of the masses of the reactants.
Explain this loss of mass.
Teacher Preview Copy
Teacher Preview Copy
9. This process releases greater amount of energy than 9.
an ordinary chemical reaction does. Name another type
of nuclear reaction that releases greater energy than an
ordinary chemical reaction.
Set E: Radioisotope uses, half-life, writing nuclear equation
Base your answers to questions 10 and 11 on the information and Table below.
Some radioisotopes used tracers to make it possible for doctors to see the images
of internal body parts and observe their functions. The table below lists information
about three radioisotopes and their body part each radioisotope is used to study.
Medical uses of Some Radioisotopes
Radioisotope Half-life Decay Mode Body Part
Na 15 hours Beta Circulatory system
24
Fe 44.5 days Beta Red blood cells
59
131
I 8.1 days Beta Thyroid
10. It could take up to 60. hours for a radioisotope to be 10.
delivered to the hospital from the laboratory where
it is produced. What fraction of an original sample
24
of Na remains unchanged after 60 hours?
59
11. Complete the equation for the nuclear decay of the 11. Fe ------ > _____ + _____
radioisotop e used to study red blood cells. Include both
atomic number and the mass number for each missing
particle.
412 Copyright © 2010 E3 Scholastic Publishing. All Rights Reserved. Survivingchem.com
Set D: Nuclear reaction equation, mass defect, nuclear energy
Base your answers to questions 7 through 9 on the nuclear equation shown below.
1
142
91
1
235 U + n ------ > Ba + Kr + 3 n + energy
92 0 56 36 0
7. State the type of nuclear reaction represented 7.
by the equation.
8. The sum of the masses of the products is slightly 8.
less than the sum of the masses of the reactants.
Explain this loss of mass.
Teacher Preview Copy
Teacher Preview Copy
9. This process releases greater amount of energy than 9.
an ordinary chemical reaction does. Name another type
of nuclear reaction that releases greater energy than an
ordinary chemical reaction.
Set E: Radioisotope uses, half-life, writing nuclear equation
Base your answers to questions 10 and 11 on the information and Table below.
Some radioisotopes used tracers to make it possible for doctors to see the images
of internal body parts and observe their functions. The table below lists information
about three radioisotopes and their body part each radioisotope is used to study.
Medical uses of Some Radioisotopes
Radioisotope Half-life Decay Mode Body Part
Na 15 hours Beta Circulatory system
24
Fe 44.5 days Beta Red blood cells
59
131
I 8.1 days Beta Thyroid
10. It could take up to 60. hours for a radioisotope to be 10.
delivered to the hospital from the laboratory where
it is produced. What fraction of an original sample
24
of Na remains unchanged after 60 hours?
59
11. Complete the equation for the nuclear decay of the 11. Fe ------ > _____ + _____
radioisotop e used to study red blood cells. Include both
atomic number and the mass number for each missing
particle.
412 Copyright © 2010 E3 Scholastic Publishing. All Rights Reserved. Survivingchem.com
