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- How much energy in kJ/mol is released by the fission of uranium-235 to form barium-140 and krypton-93? The atomic masses are
Problem 9
(a) 6.59 x 10^9 kJ/mol (b) 1.66 x 10^10 kJ/mol (c) 1.98 x 10^11 kJ/mol (d) 1.66 x 10^16 kJ/mol - A sample 99mTc used for a whole body bone scan has an activity of 600 MBq. If the half-life is 6.01 hours, what mass of 99mTc was injected? (a) 3.1 ng (b) 8.4 microgram (c) 67 microgram (d) 2.7 mg
Problem 11
Problem 20.31d
Complete and balance the following nuclear equations.
(d) <ISOTOPE CHEM REACTION>
Problem 20.36d
Write balanced nuclear equations for the following processes.
(d) Positron emission of 165Ta
- Isotope A decays to isotope E through the following series of steps, in which the products of the individual decay events are themselves radioactive and undergo further decay until a stable nucleus is ultimately reached. Two kinds of processes are represented, one by the shorter arrows pointing right and the other by the longer arrows pointing left. (b) Identify and write the symbol
Problem 25
for each isotope in the series: 
- Positron emission and electron capture both give a product nucleus whose atomic number is 1 less than the starting nucleus. Explain.
Problem 26
- What is the difference between an a particle and a helium atom?
Problem 27
- Why does beta emission raise the atomic number of the product while positron emission lowers. the atomic number?
Problem 28
- Why does gamma emission not change the atomic number of the product?
Problem 29
Problem 30a
Complete and balance the following nuclear equations. (a)
Problem 30b
Complete and balance the following nuclear equations. (b)
Problem 30d
Complete and balance the following nuclear equations. (d)
Problem 31a
Complete and balance the following nuclear equations. (a)
Problem 31b
Complete and balance the following nuclear equations. (b)
- What particle is produced by the decay of thorium-214 to radium-210?
Problem 32
- What particle is produced by the decay of uranium-239 to neptunium-239?
Problem 33
Problem 34a
What particle is produced in each of the following decay reactions? (a)
Problem 34b
What particle is produced in each of the following decay reactions? (b)
Problem 34c
What particle is produced in each of the following decay reactions? (c)
Problem 35a
What particle is produced in each of the following decay reactions? (a)
Problem 35b
What particle is produced in each of the following decay reactions? (b)
Problem 35c
What particle is produced in each of the following decay reactions? (c)
Problem 36a
Write balanced nuclear equations for the following processes. (a) Alpha emission of 162Re
Problem 36b
Write balanced nuclear equations for the following processes. (b) Electron capture of 138Sm
Problem 36c
Write balanced nuclear equations for the following processes. (c) Beta emission of 188W
Problem 37a
Write balanced nuclear equations for the following processes. (a) Beta emission of 157Eu
Problem 37b
Write balanced nuclear equations for the following processes. (b) Electron capture of 126Ba
Problem 37c
Write balanced nuclear equations for the following processes. (c) Alpha emission of 146Sm
- Radioactive 100Tc decays to form 100Mo. There are two possible pathways for this decay. Write the balanced equations for both pathways.
Problem 38
- 226Ac can decay by any of three different nuclear processes: a emission, b emission, or electron capture. Write a balanced nuclear equation for the decay of 226Ac by each process.
Problem 39