Question 1

Determine the identity of the daughter nuclide from the beta decay of   Sr.

Accepted Answer

A)    Sr 
B)    Y 
C)    Y 
D)    Kr 
E)    Se 
A)    Sr 
B)    Y 
C)    Y 
D)    Kr 
E)    Se

Question 2

The following reaction represents what nuclear process? 
  Am →   He +   Np

Accepted Answer

A)  beta emission 
B)  neutron bombardment 
C)  alpha emission 
D)  electron capture 
E)  positron emission 
A)  beta emission 
B)  neutron bombardment 
C)  alpha emission 
D)  electron capture 
E)  positron emission

Question 3

Determine the identity of the daughter nuclide from the electron capture by   Fe.

Accepted Answer

A)    Co 
B)    Mn 
C)    Co 
D)    Mn 
E)    Cr 
A)    Co 
B)    Mn 
C)    Co 
D)    Mn 
E)    Cr

Question 4

Determine the half-life of a nuclide that loses 38.0% of its mass in 387 hours.

Accepted Answer

A)  277 hours 
B)  455 hour 
C)  561 hours 
D)  639 hours 
E)  748 hours 
A)  277 hours 
B)  455 hour 
C)  561 hours 
D)  639 hours 
E)  748 hours

Question 5

What is the correct technique used in radiometric dating of rocks?

Accepted Answer

A)  uranium-238 to lead-206 
B)  potassium-40 to argon-40 
C)  carbon-14 to nitrogen-14 
D)  bismuth-206 to uranium-238 
E)  calcium-41 to argon-42 
A)  uranium-238 to lead-206 
B)  potassium-40 to argon-40 
C)  carbon-14 to nitrogen-14 
D)  bismuth-206 to uranium-238 
E)  calcium-41 to argon-42

Question 6

Stable isotopes with low atomic numbers have an N/Z ratio of 1. What does that imply?

Accepted Answer

A)  The number of neutrons equals the number of protons. 
B)  The number of neutrons equals the number of electrons plus protons. 
C)  The number of protons equals the number of electrons. 
D)  The atomic number equals the atomic mass. 
E)  The number of protons equals the number of electrons plus neutrons. 
A)  The number of neutrons equals the number of protons. 
B)  The number of neutrons equals the number of electrons plus protons. 
C)  The number of protons equals the number of electrons. 
D)  The atomic number equals the atomic mass. 
E)  The number of protons equals the number of electrons plus neutrons.

Question 7

Calculate the mass defect in Ni-59 if the mass of a Ni-59 nucleus is 58.69344 u. The mass of a proton is 1.00728 u and the mass of a neutron is 1.008665 u.

Accepted Answer

A)  0.23212 u 
B)  0.77902 u 
C)  0.23041 u 
D)  0.77589 u 
E)  0.22198 u 
A)  0.23212 u 
B)  0.77902 u 
C)  0.23041 u 
D)  0.77589 u 
E)  0.22198 u

Question 8

Describe what changes occur in the atomic nucleus during electron capture.

Accepted Answer

A)  The mass number and atomic number decrease. 
B)  The mass number and atomic number increase. 
C)  The mass number is unchanged and the atomic number decreases. 
D)  The mass number is unchanged and the atomic number increases. 
E)  The mass number and atomic number do not change. 
A)  The mass number and atomic number decrease. 
B)  The mass number and atomic number increase. 
C)  The mass number is unchanged and the atomic number decreases. 
D)  The mass number is unchanged and the atomic number increases. 
E)  The mass number and atomic number do not change.

Question 9

If we start with 1.000 g of cobalt-60, 0.4000 g will remain after 7.00 y. This means that the   of   is ________ y.

Accepted Answer

A)  2.80 
B)  17.5 
C)  7.64 
D)  1.94 
E)  5.29 
A)  2.80 
B)  17.5 
C)  7.64 
D)  1.94 
E)  5.29

Question 10

Beta decay of 60Co produces a beta particle and ________.

Accepted Answer

A)  (56Mn) 
B)  (59Co) 
C)  (60Fe) 
D)  (60Ni) 
A)  (56Mn) 
B)  (59Co) 
C)  (60Fe) 
D)  (60Ni)

Question 11

Calculate the mass defect in Mo-96 if the mass of a Mo-96 nucleus is 95.962 u. The mass of a proton is 1.00728 u and the mass of a neutron is 1.008665 u.

Accepted Answer

A)  0.197 u 
B)  0.795 u 
C)  0.212 u 
D)  0.812 u 
E)  0.188 u 
A)  0.197 u 
B)  0.795 u 
C)  0.212 u 
D)  0.812 u 
E)  0.188 u

Question 12

Match the following.
-beta particle

Accepted Answer

A)   e 
B)   p 
C)   He 
D)   g 
E)   n
F)  e 
A)   e 
B)   p 
C)   He 
D)   g 
E)   n
F)  e

Question 13

Atoms with Z > ________ are radioactive and decay in one or more steps involving mostly alpha and beta decay.

Accepted Answer

A)  60 
B)  100 
C)  83 
D)  160 
E)  40 
A)  60 
B)  100 
C)  83 
D)  160 
E)  40

Question 14

Determine the identity of the daughter nuclide from the alpha decay of   Po.

Accepted Answer

A)    Rn 
B)    Pb 
C)    Ra 
D)    Hg 
E)    At 
A)    Rn 
B)    Pb 
C)    Ra 
D)    Hg 
E)    At

Question 15

The following reaction represents what nuclear process? 
  Pb →   e +   Bi

Accepted Answer

A)  alpha emission 
B)  gamma emission 
C)  electron capture 
D)  neutron bombardment 
E)  beta emission 
A)  alpha emission 
B)  gamma emission 
C)  electron capture 
D)  neutron bombardment 
E)  beta emission

Question 16

Neptunium-239 has a half-life of 2.35 days. How many days must elapse for a sample of 239Np to decay to 0.100% of its original quantity?

Accepted Answer

A)  0.0 427 days 
B)  1.491 days 
C)  2.04 days 
D)  23.4 days 
A)  0.0 427 days 
B)  1.491 days 
C)  2.04 days 
D)  23.4 days

Question 17

Identify the missing particle in the following nuclear equation: 
  Pb →   e + ?

Accepted Answer

A)    Bi 
B)    Tl 
C)    Pb 
D)    Pb 
E)    Tl 
A)    Bi 
B)    Tl 
C)    Pb 
D)    Pb 
E)    Tl

Question 18

A rock contains 0.413 mg of lead-206 for each milligram of uranium-238. The   for the decay of uranium-238 to lead-206 is 4.5 × 109 y. The rock was formed ________ y. ago.

Accepted Answer

A)  4.80 × 109 
B)  1.86 × 109 
C)  3.10 × 109 
D)  7.34 × 109 
E)  2.53 × 109 
A)  4.80 × 109 
B)  1.86 × 109 
C)  3.10 × 109 
D)  7.34 × 109 
E)  2.53 × 109

Question 19

Explain the concept of "magic numbers."

Accepted Answer

They are even number

Question 20

Complete the following equation of transmutation. 
  Al +   He →   P + ________

Accepted Answer

A)    e 
B)    g 
C)    e 
D)    H 
E)    n 
A)    e 
B)    g 
C)    e 
D)    H 
E)    n

Exam 19: Radioactivity and Nuclear Chemistry

Determine the identity of the daughter nuclide from the beta decay of Sr.

The following reaction represents what nuclear process? Am → He + Np

Determine the identity of the daughter nuclide from the electron capture by Fe.

Determine the half-life of a nuclide that loses 38.0% of its mass in 387 hours.

What is the correct technique used in radiometric dating of rocks?

Stable isotopes with low atomic numbers have an N/Z ratio of 1. What does that imply?

Calculate the mass defect in Ni-59 if the mass of a Ni-59 nucleus is 58.69344 u. The mass of a proton is 1.00728 u and the mass of a neutron is 1.008665 u.

Describe what changes occur in the atomic nucleus during electron capture.

If we start with 1.000 g of cobalt-60, 0.4000 g will remain after 7.00 y. This means that the of is ________ y.

Beta decay of 60Co produces a beta particle and ________.

Calculate the mass defect in Mo-96 if the mass of a Mo-96 nucleus is 95.962 u. The mass of a proton is 1.00728 u and the mass of a neutron is 1.008665 u.

Match the following. -beta particle

Atoms with Z > ________ are radioactive and decay in one or more steps involving mostly alpha and beta decay.

Determine the identity of the daughter nuclide from the alpha decay of Po.

The following reaction represents what nuclear process? Pb → e + Bi

Neptunium-239 has a half-life of 2.35 days. How many days must elapse for a sample of 239Np to decay to 0.100% of its original quantity?

Identify the missing particle in the following nuclear equation: Pb → e + ?

A rock contains 0.413 mg of lead-206 for each milligram of uranium-238. The for the decay of uranium-238 to lead-206 is 4.5 × 109 y. The rock was formed ________ y. ago.

Explain the concept of "magic numbers."

Complete the following equation of transmutation. Al + He → P + ________

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Molecules, Compounds, and Nomenclature

Chemical Reactions and Stoichiometry

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes, Valence Bond Theory, and Molecular Orbital Theory

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Organic Chemistry I: Structures

Organic Chemistry Ii: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

Beta decay of ⁶⁰Co produces a beta particle and ________.

Neptunium-239 has a half-life of 2.35 days. How many days must elapse for a sample of ²³⁹Np to decay to 0.100% of its original quantity?

A rock contains 0.413 mg of lead-206 for each milligram of uranium-238. The for the decay of uranium-238 to lead-206 is 4.5 × 10⁹ y. The rock was formed ________ y. ago.