Question 1

55Mn can be prepared by electron capture from which of the following?

Accepted Answer

A) (56Mn) 
B) (55Fe) 
C) (55Cr) 
D) (51V) 
E) (57Co) 
A) (56Mn) 
B) (55Fe) 
C) (55Cr) 
D) (51V) 
E) (57Co)

Question 2

When the nucleus of an element undergoes beta emission

Accepted Answer

A) the mass number increases by one. 
B) the mass number decreases by one. 
C) the atomic number decreases by one. 
D) the number of neutrons increases by one. 
E) the atomic number increases by one. 
A) the mass number increases by one. 
B) the mass number decreases by one. 
C) the atomic number decreases by one. 
D) the number of neutrons increases by one. 
E) the atomic number increases by one.

Question 3

Which particle does the nuclide symbol   represent?

Accepted Answer

A) positron 
B) helium nucleus 
C) electron 
D) proton 
E) gamma photon 
A) positron 
B) helium nucleus 
C) electron 
D) proton 
E) gamma photon

Question 4

A scintillation counter measures radiation by detecting

Accepted Answer

A) cations produced from radiation colliding with phosphor gases. 
B) electrons released when gas atoms are ionized by the radiation. 
C) alpha and beta particles as they strike a detector window. 
D) the increase in temperature when a gas is struck by radiation. 
E) flashes of light emitted from a phosphor affected by radiation. 
A) cations produced from radiation colliding with phosphor gases. 
B) electrons released when gas atoms are ionized by the radiation. 
C) alpha and beta particles as they strike a detector window. 
D) the increase in temperature when a gas is struck by radiation. 
E) flashes of light emitted from a phosphor affected by radiation.

Question 5

Strontium-90 is produced in nuclear explosions.It can replace calcium in the bone.The half-life of 90Sr is 27.7 years.If the activity of 90Sr in the bones of an exposed person were 90 disintegrations per second,how long would it take the activity of 90Sr to decrease to 8.1 disintegrations per second?

Accepted Answer

A) 96 years 
B) 66 years 
C) 49 years 
D) 59 years 
E) 75 years 
A) 96 years 
B) 66 years 
C) 49 years 
D) 59 years 
E) 75 years

Question 6

Which of the following radioactive isotopes is not commonly used in medical applications?

Accepted Answer

A) technetium-99m 
B) iodine-131 
C) strontium-90 
D) cobalt-60 
E) thallium-201 
A) technetium-99m 
B) iodine-131 
C) strontium-90 
D) cobalt-60 
E) thallium-201

Question 7

The rate constant for the decay of a radioactive isootope is 4.226 × 10-3 / day.What is the half-life of of this isotope?

Accepted Answer

A) 328.0 days 
B) 410.0 days 
C) 82.00 days 
D) 164.0 days 
E) none of these 
A) 328.0 days 
B) 410.0 days 
C) 82.00 days 
D) 164.0 days 
E) none of these

Question 8

The radioactive nuclide,22Na,undergoes decay by emitting a positron.What is the nuclear composition of the product nuclide?

Accepted Answer

A) 12 protons and 10 neutrons 
B) 11 protons and 11 neutrons 
C) 11 protons and 10 neutrons 
D) 9 protons and 12 neutrons 
E) 10 protons and 12 neutrons 
A) 12 protons and 10 neutrons 
B) 11 protons and 11 neutrons 
C) 11 protons and 10 neutrons 
D) 9 protons and 12 neutrons 
E) 10 protons and 12 neutrons

Question 9

For which of the following radioactive decay processes does the atomic number not change?

Accepted Answer

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

Question 10

Which is the most likely mode of radioactive decay for the radioactive nuclide carbon-14?

Accepted Answer

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

⁵⁵Mn can be prepared by electron capture from which of the following?

When the nucleus of an element undergoes beta emission

Which particle does the nuclide symbol represent?

A scintillation counter measures radiation by detecting

Which of the following radioactive isotopes is not commonly used in medical applications?

The rate constant for the decay of a radioactive isootope is 4.226 × 10^-3 / day.What is the half-life of of this isotope?

The radioactive nuclide,²²Na,undergoes decay by emitting a positron.What is the nuclear composition of the product nuclide?

For which of the following radioactive decay processes does the atomic number not change?

Which is the most likely mode of radioactive decay for the radioactive nuclide carbon-14?

Chemistry and Measurement

Atoms, molecules, and Ions

Calculations With Chemical Formulas and Equations

Chemical Reactions

The Gaseous State

Thermochemistry

Quantum Theory of the Atom

Electron Configurations and Periodicity

Ionic and Covalent Bonding

Molecular Geometry and Chemical Bonding Theory

States of Matter; Liquids and Solids

Solutions

Rates of Reaction

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria

Solubility and Complex-Ion Equilibria

Thermodynamics and Equilibrium

Electrochemistry

Chemistry of the Main-Group Metals

The Transition Elements and Coordination Compounds

Organic Chemistry

Polymer Materials: Synthetic and Biological

Filters

Exam 20: Nuclear Chemistry

55Mn can be prepared by electron capture from which of the following?

When the nucleus of an element undergoes beta emission

Which particle does the nuclide symbol represent?

A scintillation counter measures radiation by detecting

Which of the following radioactive isotopes is not commonly used in medical applications?

The rate constant for the decay of a radioactive isootope is 4.226 × 10-3 / day.What is the half-life of of this isotope?

The radioactive nuclide,22Na,undergoes decay by emitting a positron.What is the nuclear composition of the product nuclide?

For which of the following radioactive decay processes does the atomic number not change?

Which is the most likely mode of radioactive decay for the radioactive nuclide carbon-14?

Chemistry and Measurement

Atoms, molecules, and Ions

Calculations With Chemical Formulas and Equations

Chemical Reactions

The Gaseous State

Thermochemistry

Quantum Theory of the Atom

Electron Configurations and Periodicity

Ionic and Covalent Bonding

Molecular Geometry and Chemical Bonding Theory

States of Matter; Liquids and Solids

Solutions

Rates of Reaction

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria

Solubility and Complex-Ion Equilibria

Thermodynamics and Equilibrium

Electrochemistry

Chemistry of the Main-Group Metals

The Transition Elements and Coordination Compounds

Organic Chemistry

Polymer Materials: Synthetic and Biological

Filters

⁵⁵Mn can be prepared by electron capture from which of the following?

The rate constant for the decay of a radioactive isootope is 4.226 × 10^-3 / day.What is the half-life of of this isotope?

The radioactive nuclide,²²Na,undergoes decay by emitting a positron.What is the nuclear composition of the product nuclide?