Question 1

Balance the equation   .

Accepted Answer

The answer of Balance the equation   ....

Question 2

What would the atom ratio of 206Pb to 238U be in a uranium mineral from a rock that is 1.0 × 109 years old? t1/2(238U)= 4.5 × 109 yr.

Accepted Answer

A) 0.14 
B) 0.16 
C) 0.22 
D) 0.86 
E) 1.16 
A) 0.14 
B) 0.16 
C) 0.22 
D) 0.86 
E) 1.16 B

Question 3

Consider the following decay series:   What type of nuclear process occurs at the transformation labeled II?

Accepted Answer

A) ($\alpha$ emission) 
B) ($\beta$ emission) 
C) positron emission 
D) electron capture 
E) gamma radiation 
A) ($\alpha$ emission) 
B) ($\beta$ emission) 
C) positron emission 
D) electron capture 
E) gamma radiation A

Question 4

A balanced nuclear equation representing the beta emission of iodine-131 is which of the following?

Accepted Answer

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

Question 5

The energy equivalent of a mass defect of - 0.1620 amu is which of the following?

Accepted Answer

A) - 1.458 x 1016 J 
B) - 2.421 x 10-8 J 
C) - 2.421 x 10-11 J 
D) - 2.421 x 1013 J 
E) - 1.458 x 10-11 J 
A) - 1.458 x 1016 J 
B) - 2.421 x 10-8 J 
C) - 2.421 x 10-11 J 
D) - 2.421 x 1013 J 
E) - 1.458 x 10-11 J

Question 6

What fraction of radioactive atoms remains in a sample after five half-lives?

Accepted Answer

A) zero 
B) 1/6 
C) 1/16 
D) 1/32 
E) 1/64 
A) zero 
B) 1/6 
C) 1/16 
D) 1/32 
E) 1/64

Question 7

Consider the following decay series:   What is the complete element symbol for the product labeled Y?

Accepted Answer

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

Question 8

The alpha particles emitted by radon-222 have an energy of 8.8 × 10-13 J.If a 200.g Pb brick absorbs 1.0 × 1010 alpha particles from radon decay, what dose in rads will the brick absorb?

Accepted Answer

Question 9

The energy released by the sun is the result of

Accepted Answer

A) natural radioactivity. 
B) nuclear fusion. 
C) combustion of hydrogen. 
D) photosynthesis. 
E) nuclear fission. 
A) natural radioactivity. 
B) nuclear fusion. 
C) combustion of hydrogen. 
D) photosynthesis. 
E) nuclear fission.

Question 10

In the following reaction, identify X.

Accepted Answer

A) ($\alpha$) 
B) n 
C) p 
D)  ( ) 
E) ($\beta$) 
A) ($\alpha$) 
B) n 
C) p 
D)  ( ) 
E) ($\beta$)

Question 11

A typical radius of an atomic nucleus is about

Accepted Answer

A) 100 µm 
B) 5000 mm 
C) 100 nm 
D) 5 × 10-3 pm 
E) 500 pm 
A) 100 µm 
B) 5000 mm 
C) 100 nm 
D) 5 × 10-3 pm 
E) 500 pm

Question 12

The only stable isotope of aluminum is aluminum-27.What type of radioactive decay should be expected from   Al?

Accepted Answer

A)    H 
B)    n 
C)    
D)    
E)    He 
A)    H 
B)    n 
C)    
D)    
E)    He

Question 13

Find the nuclear binding energy of potassium-40 (atomic mass = 39.9632591 amu)in units of joules per nucleon.[Data: neutron mass = 1.674928 × 10-24 g; proton mass = 1.672623 × 10-24g; electron mass = 9.109387 × 10-28 g; NA = 6.0221367 × 1023 /mol; c = 2.99792458 × 108 m/s]

Accepted Answer

A) 1.37 × 10-12 J/nucleon 
B) 5.48 × 10-11 J/nucleon 
C) 5.64 × 10-11 J/nucleon 
D) 1.41 × 10-12 J/nucleon 
E) 2.97 × 10-12 J/nucleon 
A) 1.37 × 10-12 J/nucleon 
B) 5.48 × 10-11 J/nucleon 
C) 5.64 × 10-11 J/nucleon 
D) 1.41 × 10-12 J/nucleon 
E) 2.97 × 10-12 J/nucleon

Question 14

What type of nuclear process is illustrated below?

Accepted Answer

beta decay

Question 15

The isotope of iodine with mass number 128 undergoes beta decay with a half-life of 25.00 minutes.How long will it take for 93.75% of a sample of pure 128 I to decay?

Accepted Answer

Question 16

Consider the following decay series:   
What type of nuclear process occurs at the transformation labeled II?

Accepted Answer

A) ($\alpha$ emission) 
B) ($\beta$ emission) 
C) positron emission 
D) electron capture 
E) gamma radiation 
A) ($\alpha$ emission) 
B) ($\beta$ emission) 
C) positron emission 
D) electron capture 
E) gamma radiation

Question 17

Complete and balance the nuclear equation

Accepted Answer

The answer of Complete and balance the nuclear equation ...

Question 18

In the following reaction, identify X.

Accepted Answer

A) 7$\beta$ 
B) 3$\alpha$ 
C) 4n 
D)    
E) 15p 
A) 7$\beta$ 
B) 3$\alpha$ 
C) 4n 
D)    
E) 15p

Question 19

The heaviest known isotope of hydrogen is called tritium,   .It decays by beta emission, and has a half-life of 12.3 years.What fraction of a tritium sample will remain after 5.20 years?

Accepted Answer

A) 0.0210 
B) 0.746 
C) 3.41 
D) 0.254 
E) 0.423 
A) 0.0210 
B) 0.746 
C) 3.41 
D) 0.254 
E) 0.423

Question 20

What fraction of radioactive atoms remains in a sample after six half-lives?

Accepted Answer

A) zero 
B) 1/6 
C) 1/16 
D) 1/32 
E) 1/64 
A) zero 
B) 1/6 
C) 1/16 
D) 1/32 
E) 1/64

Exam 19: Nuclear Chemistry

Balance the equation .

What would the atom ratio of 206Pb to 238U be in a uranium mineral from a rock that is 1.0 × 109 years old? t1/2(238U)= 4.5 × 109 yr.

Consider the following decay series: What type of nuclear process occurs at the transformation labeled II?

A balanced nuclear equation representing the beta emission of iodine-131 is which of the following?

The energy equivalent of a mass defect of - 0.1620 amu is which of the following?

What fraction of radioactive atoms remains in a sample after five half-lives?

Consider the following decay series: What is the complete element symbol for the product labeled Y?

The alpha particles emitted by radon-222 have an energy of 8.8 × 10-13 J.If a 200.g Pb brick absorbs 1.0 × 1010 alpha particles from radon decay, what dose in rads will the brick absorb?

The energy released by the sun is the result of

In the following reaction, identify X.

A typical radius of an atomic nucleus is about

The only stable isotope of aluminum is aluminum-27.What type of radioactive decay should be expected from Al?

Find the nuclear binding energy of potassium-40 (atomic mass = 39.9632591 amu)in units of joules per nucleon.[Data: neutron mass = 1.674928 × 10-24 g; proton mass = 1.672623 × 10-24g; electron mass = 9.109387 × 10-28 g; NA = 6.0221367 × 1023 /mol; c = 2.99792458 × 108 m/s]

What type of nuclear process is illustrated below?

The isotope of iodine with mass number 128 undergoes beta decay with a half-life of 25.00 minutes.How long will it take for 93.75% of a sample of pure 128 I to decay?

Consider the following decay series: What type of nuclear process occurs at the transformation labeled II?

Complete and balance the nuclear equation

In the following reaction, identify X.

The heaviest known isotope of hydrogen is called tritium, .It decays by beta emission, and has a half-life of 12.3 years.What fraction of a tritium sample will remain after 5.20 years?

What fraction of radioactive atoms remains in a sample after six half-lives?

Chemistry: the Study of Change

Atoms, Molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Gases

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy Free Energy and Equilibrium

Electrochemistry

Chemistry in the Atmosphere

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metal Chemistry and Coordination Compounds

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What would the atom ratio of ²⁰⁶Pb to ²³⁸U be in a uranium mineral from a rock that is 1.0 × 10⁹ years old? t_1/2(²³⁸U)= 4.5 × 10⁹ yr.

The alpha particles emitted by radon-222 have an energy of 8.8 × 10^-13 J.If a 200.g Pb brick absorbs 1.0 × 10¹⁰ alpha particles from radon decay, what dose in rads will the brick absorb?

Find the nuclear binding energy of potassium-40 (atomic mass = 39.9632591 amu)in units of joules per nucleon.[Data: neutron mass = 1.674928 × 10^-24 g; proton mass = 1.672623 × 10^-24g; electron mass = 9.109387 × 10^-28 g; N_A = 6.0221367 × 10²³ /mol; c = 2.99792458 × 10⁸ m/s]

The isotope of iodine with mass number 128 undergoes beta decay with a half-life of 25.00 minutes.How long will it take for 93.75% of a sample of pure ¹²⁸I to decay?