Question 1

If we start with 1.000 g of cobalt-60,0.675 g will remain after 3.00 yr.This means that the half-life of cobalt-60 is ________ yr.

Accepted Answer

A) 3.08 
B) 4.44 
C) 2.03 
D) 5.30 
E) 7.65 
A) 3.08 
B) 4.44 
C) 2.03 
D) 5.30 
E) 7.65

Question 2

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

Accepted Answer

A)   Th 
B)   Np 
C)   Ac 
D)   U 
E)   Th 
A)   Th 
B)   Np 
C)   Ac 
D)   U 
E)   Th

Question 3

Which of the following elements would be expected to be particularly stable?

Accepted Answer

A)   C 
B)   B 
C)   Be 
D)   Li 
A)   C 
B)   B 
C)   Be 
D)   Li

Question 4

Which particle has the highest penetrating power?

Accepted Answer

A) alpha particle 
B) beta particle 
C) gamma particle 
D) positron emission 
E) electron capture 
A) alpha particle 
B) beta particle 
C) gamma particle 
D) positron emission 
E) electron capture

Question 5

Identify the symptom that is not from radiation exposure.

Accepted Answer

A) measles 
B) increased cancer risk 
C) death 
D) genetic effects 
E) weaker immune systems 
A) measles 
B) increased cancer risk 
C) death 
D) genetic effects 
E) weaker immune systems

Question 6

Write a nuclear equation to describe the neutron induced fission of U-235 to form Xe-134 and Sr-100.Determine how many neutrons are produced in the reaction.

Accepted Answer

A) 4 
B) 3 
C) 1 
D) 0 
E) 2 
A) 4 
B) 3 
C) 1 
D) 0 
E) 2

Question 7

Identify the element that is not used as a radioactive tracer.

Accepted Answer

A) iron-59 
B) phosphorus-32 
C) thallium-201 
D) iodine-131 
E) carbon-13 
A) iron-59 
B) phosphorus-32 
C) thallium-201 
D) iodine-131 
E) carbon-13

Question 8

Which nuclide below is most likely to decay by electron capture?

Accepted Answer

A)   Re 
B)   Re 
C)   Re 
D)   Re 
A)   Re 
B)   Re 
C)   Re 
D)   Re

Question 9

Determine the identity of the daughter nuclide from the positron emission of  C.

Accepted Answer

A)   B 
B)   N 
C)   C 
D)   B 
E)   N 
A)   B 
B)   N 
C)   C 
D)   B 
E)   N

Question 10

A geological sample is found to have a Pb-206/U-238 mass ratio of 0.337/1.00.Assuming there was no Pb-206 present when the sample was formed,how old is it? The half-life of U-238 is 4.5 × 109 years.

Accepted Answer

A) 7.3 × 1011 years 
B) 1.4 × 1010 years 
C) 2.4 × 1010 years 
D) 2.1 × 109 years 
E) 7.1 × 109 years 
A) 7.3 × 1011 years 
B) 1.4 × 1010 years 
C) 2.4 × 1010 years 
D) 2.1 × 109 years 
E) 7.1 × 109 years

Question 11

The following reaction represents what nuclear process? 
 H + H → He + N

Accepted Answer

A) nuclear fusion 
B) alpha emission 
C) beta emission 
D) nuclear fission 
E) neutron capture 
A) nuclear fusion 
B) alpha emission 
C) beta emission 
D) nuclear fission 
E) neutron capture

Question 12

Identify the elements used in radiometric dating.

Accepted Answer

A) Carbon-14 to nitrogen-14. 
B) Uranium-238 to lead-206. 
C) Potassium-40 to argon-40. 
D) None of the above. 
E) All of the above. 
A) Carbon-14 to nitrogen-14. 
B) Uranium-238 to lead-206. 
C) Potassium-40 to argon-40. 
D) None of the above. 
E) All of the above.

Question 13

Match the following.
-beta particle

Accepted Answer

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

Question 14

Carbon-11 is used in medical imaging.The half-life of this radioisotope is 20.4 min.What percentage of a sample remains after 60.0 min?

Accepted Answer

A) 71.2 
B) 5.28 
C) 13.0 
D) 34.0 
E) 2.94 
A) 71.2 
B) 5.28 
C) 13.0 
D) 34.0 
E) 2.94

Question 15

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) 0.0427 days 
B) 1.491 days 
C) 2.04 days 
D) 23.4 days 
A) 0.0427 days 
B) 1.491 days 
C) 2.04 days 
D) 23.4 days

Question 16

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 17

Stable isotopes,with low atomic numbers,have a 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 18

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

Accepted Answer

A)   Ru 
B)   Rh 
C)   Nb 
D)   Mo 
E)   Ru 
A)   Ru 
B)   Rh 
C)   Nb 
D)   Mo 
E)   Ru

Question 19

If we start with 1.000 g of strontium-90,0.908 g will remain after 4.00 yr.This means that the half-life of strontium-90 is ________ yr.

Accepted Answer

A) 3.05 
B) 4.40 
C) 28.8 
D) 3.63 
E) 41.6 
A) 3.05 
B) 4.40 
C) 28.8 
D) 3.63 
E) 41.6

Question 20

Calculate the mass defect in Fe-56 if the mass of an Fe-56 nucleus is 55.921 amu.The mass of a proton is 1.00728 amu and the mass of a neutron is 1.008665 amu.

Accepted Answer

A) 0.528 amu 
B) 3.507 amu 
C) 0.564 amu 
D) 1.056 amu 
E) 0.079 amu 
A) 0.528 amu 
B) 3.507 amu 
C) 0.564 amu 
D) 1.056 amu 
E) 0.079 amu

If we start with 1.000 g of cobalt-60,0.675 g will remain after 3.00 yr.This means that the half-life of cobalt-60 is ________ yr.

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

Which of the following elements would be expected to be particularly stable?

Which particle has the highest penetrating power?

Identify the symptom that is not from radiation exposure.

Write a nuclear equation to describe the neutron induced fission of U-235 to form Xe-134 and Sr-100.Determine how many neutrons are produced in the reaction.

Identify the element that is not used as a radioactive tracer.

Which nuclide below is most likely to decay by electron capture?

Determine the identity of the daughter nuclide from the positron emission of C.

A geological sample is found to have a Pb-206/U-238 mass ratio of 0.337/1.00.Assuming there was no Pb-206 present when the sample was formed,how old is it? The half-life of U-238 is 4.5 × 10⁹ years.

The following reaction represents what nuclear process? H +H →He +N

Identify the elements used in radiometric dating.

Match the following. -beta particle

Carbon-11 is used in medical imaging.The half-life of this radioisotope is 20.4 min.What percentage of a sample remains after 60.0 min?

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?

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

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

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

If we start with 1.000 g of strontium-90,0.908 g will remain after 4.00 yr.This means that the half-life of strontium-90 is ________ yr.

Calculate the mass defect in Fe-56 if the mass of an Fe-56 nucleus is 55.921 amu.The mass of a proton is 1.00728 amu and the mass of a neutron is 1.008665 amu.

Matter, Measurement, and Problem Solving

Atoms and Elements

Molecules, Compounds and Chemical Equations

Chemical Quantities and Aqueous Reactions

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

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Filters

Exam 19: Radioactivity and Nuclear Chemistry

If we start with 1.000 g of cobalt-60,0.675 g will remain after 3.00 yr.This means that the half-life of cobalt-60 is ________ yr.

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

Which of the following elements would be expected to be particularly stable?

Which particle has the highest penetrating power?

Identify the symptom that is not from radiation exposure.

Write a nuclear equation to describe the neutron induced fission of U-235 to form Xe-134 and Sr-100.Determine how many neutrons are produced in the reaction.

Identify the element that is not used as a radioactive tracer.

Which nuclide below is most likely to decay by electron capture?

Determine the identity of the daughter nuclide from the positron emission of C.

A geological sample is found to have a Pb-206/U-238 mass ratio of 0.337/1.00.Assuming there was no Pb-206 present when the sample was formed,how old is it? The half-life of U-238 is 4.5 × 109 years.

The following reaction represents what nuclear process? H +H →He +N

Identify the elements used in radiometric dating.

Match the following. -beta particle

Carbon-11 is used in medical imaging.The half-life of this radioisotope is 20.4 min.What percentage of a sample remains after 60.0 min?

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?

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

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

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

If we start with 1.000 g of strontium-90,0.908 g will remain after 4.00 yr.This means that the half-life of strontium-90 is ________ yr.

Calculate the mass defect in Fe-56 if the mass of an Fe-56 nucleus is 55.921 amu.The mass of a proton is 1.00728 amu and the mass of a neutron is 1.008665 amu.

Matter, Measurement, and Problem Solving

Atoms and Elements

Molecules, Compounds and Chemical Equations

Chemical Quantities and Aqueous Reactions

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

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Filters

A geological sample is found to have a Pb-206/U-238 mass ratio of 0.337/1.00.Assuming there was no Pb-206 present when the sample was formed,how old is it? The half-life of U-238 is 4.5 × 10⁹ years.

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?