Question 1

In a nuclear reaction   He is the symbol for ________.

Accepted Answer

The answer of In a nuclear reaction   He...

Question 2

The ratio of 238U to 206Pb is used to date old mineral samples.Each 1.000 g of 238U that decays eventually produces 0.866 g of 206Pb.If the half-life of 238U is 4.468 × 109 years,what is the age of a mineral that has a 238U/206Pb mass ratio of 2.00?

Accepted Answer

A) 2.94 × 109 years 
B) 3.60 × 109 years 
C) 3.87 × 109 years 
D) 4.47 × 109 years 
A) 2.94 × 109 years 
B) 3.60 × 109 years 
C) 3.87 × 109 years 
D) 4.47 × 109 years

Question 3

Beta decay of 24Na produces a beta particle and

Accepted Answer

A) .20F. 
B) .23Na. 
C) .24Ne. 
D) .24Mg. 
A) .20F. 
B) .23Na. 
C) .24Ne. 
D) .24Mg.

Question 4

Radiation is dangerous to organisms because

Accepted Answer

A) all radionuclides are poisonous. 
B) it causes electrolysis of water in the cells. 
C) it causes nuclear reactions in the cells. 
D) it ionizes molecules in the cells. 
A) all radionuclides are poisonous. 
B) it causes electrolysis of water in the cells. 
C) it causes nuclear reactions in the cells. 
D) it ionizes molecules in the cells.

Question 5

Which of the following processes will decrease the neutron/ proton ratio?

Accepted Answer

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

Question 6

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 7

Which one of the following processes does not result in transmutation to another element?

Accepted Answer

A) alpha emission 
B) positron decay 
C) electron capture 
D) gamma emission 
A) alpha emission 
B) positron decay 
C) electron capture 
D) gamma emission

Question 8

Fluorine-18 is an isotope used in Positron Emission Tomography (PET)to scan the brain.If a researcher has 1.50 μg of 18F,how long before it decays to 1.0 ng? The half-life of 18F is 109.8 minutes.

Accepted Answer

A) 5.2 × 10-2 hr 
B) 4.6 × 10-2 hr 
C) 19 hr 
D) 51 hr 
A) 5.2 × 10-2 hr 
B) 4.6 × 10-2 hr 
C) 19 hr 
D) 51 hr

Question 9

Calculate the mass defect for the formation of phosphorus-31.The mass of a phosphorus-31 nucleus is 30.973765 amu.The masses of a proton and a neutron are 1.00728 and 1.00866 amu,respectively.

Accepted Answer

A) 0.13015 amu 
B) 0.15404 amu 
C) 0.27261 amu 
D) 0.27399 amu 
A) 0.13015 amu 
B) 0.15404 amu 
C) 0.27261 amu 
D) 0.27399 amu

Question 10

Tell the type of decay process occurring in the following nuclear reaction.

Accepted Answer

A) α emission 
B) β emission 
C) γ emission 
D) electron capture or positron emission 
A) α emission 
B) β emission 
C) γ emission 
D) electron capture or positron emission

Question 11

Po decays by electron capture to give   Bi.If unshaded spheres represent   Po atoms and shaded spheres represent   Bi atoms,how many half-lives have passed in the following example?

Accepted Answer

A) 1 half-life 
B) 2 half-lives 
C) 3 half-lives 
D) 4 half-lives 
A) 1 half-life 
B) 2 half-lives 
C) 3 half-lives 
D) 4 half-lives

Question 12

In addition to a beta particle,what is the other product of beta decay of   Tl?

Accepted Answer

A)   
Au 
B)   
Hg 
C)   
Pb 
D)   
Bi 
A)   
Au 
B)   
Hg 
C)   
Pb 
D)   
Bi

Question 13

In a nuclear reaction,the symbol for a beta particle is ________.

Accepted Answer

The answer of In a nuclear reaction,the symbol for a...

Question 14

Which of the following decay processes give a product nuclide whose atomic number is one less than the starting nuclide?

Accepted Answer

A) alpha decay 
B) beta decay and positron decay 
C) gamma decay and beta decay 
D) positron decay and electron capture 
A) alpha decay 
B) beta decay and positron decay 
C) gamma decay and beta decay 
D) positron decay and electron capture

Question 15

Tell the type of decay process occurring in the following nuclear reaction.

Accepted Answer

A) α emission 
B) β emission 
C) γ emission 
D) electron capture or positron emission 
A) α emission 
B) β emission 
C) γ emission 
D) electron capture or positron emission

Question 16

The number of protons,neutrons,and total nucleons in   Ru are ________,________,and ________,respectively.

Accepted Answer

The answer of The number of protons,neutrons,and total nucleons in...

Question 17

When   Dy is formed by bombardment of   Gd,what particle(s)was (were)used for the bombardment?

Accepted Answer

A) one α 
B) three β- 
C) four neutrons 
D) three protons 
A) one α 
B) three β- 
C) four neutrons 
D) three protons

Question 18

If a log contains 60.0% of the 14C present in a living tree,how long has the log been dead? The half-life of 14C is 5730 years.

Accepted Answer

A) 2290 years 
B) 3430 years 
C) 4220 years 
D) 7560 years 
A) 2290 years 
B) 3430 years 
C) 4220 years 
D) 7560 years

Question 19

-What kind of decay process is occurring in the decay of isotope B to isotope C in the figure shown above?

Accepted Answer

A) α emission 
B) β emission 
C) γ emission 
D) electron capture or positron emission 
A) α emission 
B) β emission 
C) γ emission 
D) electron capture or positron emission

Question 20

-What kind of decay process is occurring in the decay of isotope A to isotope B in the figure shown above?

Accepted Answer

A) α emission 
B) β emission 
C) γ emission 
D) electron capture or positron emission 
A) α emission 
B) β emission 
C) γ emission 
D) electron capture or positron emission

Exam 19: Nuclear Chemistry

In a nuclear reaction He is the symbol for ________.

The ratio of 238U to 206Pb is used to date old mineral samples.Each 1.000 g of 238U that decays eventually produces 0.866 g of 206Pb.If the half-life of 238U is 4.468 × 109 years,what is the age of a mineral that has a 238U/206Pb mass ratio of 2.00?

Beta decay of 24Na produces a beta particle and

Radiation is dangerous to organisms because

Which of the following processes will decrease the neutron/ proton ratio?

Beta decay of 60Co produces a beta particle and

Which one of the following processes does not result in transmutation to another element?

Fluorine-18 is an isotope used in Positron Emission Tomography (PET)to scan the brain.If a researcher has 1.50 μg of 18F,how long before it decays to 1.0 ng? The half-life of 18F is 109.8 minutes.

Calculate the mass defect for the formation of phosphorus-31.The mass of a phosphorus-31 nucleus is 30.973765 amu.The masses of a proton and a neutron are 1.00728 and 1.00866 amu,respectively.

Tell the type of decay process occurring in the following nuclear reaction.

Po decays by electron capture to give Bi.If unshaded spheres represent Po atoms and shaded spheres represent Bi atoms,how many half-lives have passed in the following example?

In addition to a beta particle,what is the other product of beta decay of Tl?

In a nuclear reaction,the symbol for a beta particle is ________.

Which of the following decay processes give a product nuclide whose atomic number is one less than the starting nuclide?

Tell the type of decay process occurring in the following nuclear reaction.

The number of protons,neutrons,and total nucleons in Ru are ________,________,and ________,respectively.

When Dy is formed by bombardment of Gd,what particle(s)was (were)used for the bombardment?

If a log contains 60.0% of the 14C present in a living tree,how long has the log been dead? The half-life of 14C is 5730 years.

-What kind of decay process is occurring in the decay of isotope B to isotope C in the figure shown above?

-What kind of decay process is occurring in the decay of isotope A to isotope B in the figure shown above?

Chemical Tools: Experimentation and Measurement

Atoms, molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Periodicity and the Electronic Structure of Atoms

Ionic Compounds: Periodic Trends and Bonding

Covalent Bonding and Electron-Dot Structures

Covalent Compounds: Bonding Theories and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids, solids, and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

The Main-Group Elements

Connections to Organic and Biological Chemistry

Filters

The ratio of ²³⁸U to ²⁰⁶Pb is used to date old mineral samples.Each 1.000 g of ²³⁸U that decays eventually produces 0.866 g of ²⁰⁶Pb.If the half-life of ²³⁸U is 4.468 × 10⁹ years,what is the age of a mineral that has a ²³⁸U/²⁰⁶Pb mass ratio of 2.00?

Beta decay of ²⁴Na produces a beta particle and

Beta decay of ⁶⁰Co produces a beta particle and

Fluorine-18 is an isotope used in Positron Emission Tomography (PET)to scan the brain.If a researcher has 1.50 μg of ¹⁸F,how long before it decays to 1.0 ng? The half-life of ¹⁸F is 109.8 minutes.

The number of protons,neutrons,and total nucleons in Ru are ,,and ,respectively.

If a log contains 60.0% of the ¹⁴C present in a living tree,how long has the log been dead? The half-life of ¹⁴C is 5730 years.