Question 1

Cesium-137 undergoes beta decay and has a half-life of 30.0 years.How many beta particles are emitted by a 14.0-g sample of cesium-137 in three minutes?

Accepted Answer

A) 6.1 × 1013 
B) 6.2 × 1022 
C) 8.4 × 1015 
D) 1.3 × 10-8 
E) 8.1 × 1015 
A) 6.1 × 1013 
B) 6.2 × 1022 
C) 8.4 × 1015 
D) 1.3 × 10-8 
E) 8.1 × 1015

Question 2

The beta decay of cesium-137 has a half-life of 30.0 years.How many years must pass to reduce a 30 mg sample of cesium 137 to 5.2 mg?

Accepted Answer

A) 76 years 
B) -76 years 
C) 38 years 
D) 0.040 years 
E) 25 years 
A) 76 years 
B) -76 years 
C) 38 years 
D) 0.040 years 
E) 25 years

Question 3

The mass of a proton is 1.00728 amu and that of a neutron is   What is the mass defect (in amu)of a 57Ni nucleus? (The mass of a nickel-57 nucleus is

Accepted Answer

A) 0.5155 amu 
B) 28.76 amu 
C) -0.4932 amu 
D) 0.5141 amu 
E) 1.031 amu 
A) 0.5155 amu 
B) 28.76 amu 
C) -0.4932 amu 
D) 0.5141 amu 
E) 1.031 amu

Question 4

Conversion of one nucleus into another was first demonstrated in 1919 by ________.

Accepted Answer

The answer of Conversion of one nucleus into another was...

Question 5

If we start with 1.000 g of cobalt-60,0.400 g will remain after 7.00 yr.This means that the   of   is ________ yr.

Accepted Answer

A) 12.1 
B) 17.5 
C) 2.80 
D) 5.30 
E) 7.65 
A) 12.1 
B) 17.5 
C) 2.80 
D) 5.30 
E) 7.65

Question 6

Radioactive seeds that are implanted into a tumor are coated with ________ to stop alpha and beta ray penetration.

Accepted Answer

The answer of Radioactive seeds that are implanted into a...

Question 7

Which one of the following is true?

Accepted Answer

A) Some spontaneous nuclear reactions are exothermic. 
B) Some spontaneous nuclear reactions are endothermic. 
C) All spontaneous nuclear reactions are exothermic. 
D) There is no relationship between exothermicity and spontaneity in nuclear reactions. 
E) All spontaneous nuclear reactions are endothermic. 
A) Some spontaneous nuclear reactions are exothermic. 
B) Some spontaneous nuclear reactions are endothermic. 
C) All spontaneous nuclear reactions are exothermic. 
D) There is no relationship between exothermicity and spontaneity in nuclear reactions. 
E) All spontaneous nuclear reactions are endothermic.

Question 8

Which one of the following is a correct representation of beta particle?

Accepted Answer

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

Question 9

The belt of nuclear stability ends with the element ________.

Accepted Answer

A) lead 
B) polonium 
C) radon 
D) astatine 
E) bismuth 
A) lead 
B) polonium 
C) radon 
D) astatine 
E) bismuth

Question 10

On average,________ neutrons are produced by every fission of a uranium-235 nucleus.

Accepted Answer

A) 4 
B) 3.5 
C) 1 
D) 2.4 
E) 2 
A) 4 
B) 3.5 
C) 1 
D) 2.4 
E) 2

Question 11

Which one of the following is a correct representation of a positron?

Accepted Answer

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

Question 12

Pb has a half-life of 22.3 years and decays to produce   Hg.If you start with   of   Pb,how many grams of   Hg will you have after 15.8 years?

Accepted Answer

A) 4.60 g 
B) 2.83 g 
C) 9.20 g 
D) 2.30 g 
E) 12.5 g 
A) 4.60 g 
B) 2.83 g 
C) 9.20 g 
D) 2.30 g 
E) 12.5 g

Question 13

The beta decay of cesium-137 has a half-life of 30.0 years.How many years must pass to reduce a 25 mg sample of cesium 137 to 8.7 mg?

Accepted Answer

A) 46 
B) 32 
C) 3.2 
D) 50 
E) 52 
A) 46 
B) 32 
C) 3.2 
D) 50 
E) 52

Question 14

In the nuclear transmutation represented by 
  ,what is the product?

Accepted Answer

A) uranium-242 
B) curium-245 
C) curium-242 
D) uranium-245 
E) uranium-243 
A) uranium-242 
B) curium-245 
C) curium-242 
D) uranium-245 
E) uranium-243

Question 15

What isotope of what element is produced if uranium-238 undergoes alpha decay?

Accepted Answer

The answer of What isotope of what element is produced...

Question 16

The half-life of 223Ra is 11.4 days.How much of a 200.0 mg sample remains after 600 hours?

Accepted Answer

A) 0.219 mg 
B) 21.9 mg 
C) .0302 mg 
D) 43.8 mg 
E) 6.04 mg 
A) 0.219 mg 
B) 21.9 mg 
C) .0302 mg 
D) 43.8 mg 
E) 6.04 mg

Question 17

When an atom of an element undergoes beta decay,its proton count will change by ________ and its neutron count will change by ________.

Accepted Answer

A) +1, -1 
B) 0, 0 
C) -1, +1 
D) -2, -2 
E) -1, -1 
A) +1, -1 
B) 0, 0 
C) -1, +1 
D) -2, -2 
E) -1, -1

Question 18

When two atoms of 2H are fused to form one atom of 4He,the total energy evolved is   .What is the total change in mass (in kg)for this reaction?

Accepted Answer

A) 1.28 × 10-17 
B) 4.26 × 10-26 
C) 3.45 × 108 
D) 1.15 
E) 4.26 × 10-29 
A) 1.28 × 10-17 
B) 4.26 × 10-26 
C) 3.45 × 108 
D) 1.15 
E) 4.26 × 10-29

Question 19

Which one of the following is a correct representation of a beta particle?

Accepted Answer

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

Question 20

By what process does thorium-230 decay to radium-226?

Accepted Answer

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

Exam 21: Nuclear Chemistry

Cesium-137 undergoes beta decay and has a half-life of 30.0 years.How many beta particles are emitted by a 14.0-g sample of cesium-137 in three minutes?

The beta decay of cesium-137 has a half-life of 30.0 years.How many years must pass to reduce a 30 mg sample of cesium 137 to 5.2 mg?

The mass of a proton is 1.00728 amu and that of a neutron is What is the mass defect (in amu)of a 57Ni nucleus? (The mass of a nickel-57 nucleus is

Conversion of one nucleus into another was first demonstrated in 1919 by ________.

If we start with 1.000 g of cobalt-60,0.400 g will remain after 7.00 yr.This means that the of is ________ yr.

Radioactive seeds that are implanted into a tumor are coated with ________ to stop alpha and beta ray penetration.

Which one of the following is true?

Which one of the following is a correct representation of beta particle?

The belt of nuclear stability ends with the element ________.

On average,________ neutrons are produced by every fission of a uranium-235 nucleus.

Which one of the following is a correct representation of a positron?

Pb has a half-life of 22.3 years and decays to produce Hg.If you start with of Pb,how many grams of Hg will you have after 15.8 years?

The beta decay of cesium-137 has a half-life of 30.0 years.How many years must pass to reduce a 25 mg sample of cesium 137 to 8.7 mg?

In the nuclear transmutation represented by ,what is the product?

What isotope of what element is produced if uranium-238 undergoes alpha decay?

The half-life of 223Ra is 11.4 days.How much of a 200.0 mg sample remains after 600 hours?

When an atom of an element undergoes beta decay,its proton count will change by ________ and its neutron count will change by ________.

When two atoms of 2H are fused to form one atom of 4He,the total energy evolved is .What is the total change in mass (in kg)for this reaction?

Which one of the following is a correct representation of a beta particle?

By what process does thorium-230 decay to radium-226?

Introduction: Matter, energy, and Measurement

Atoms, molecules, and Ions

Chemical Reactions and Reaction Stoichiometry

Reactions in Aqueous Solution

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

The mass of a proton is 1.00728 amu and that of a neutron is What is the mass defect (in amu)of a ⁵⁷Ni nucleus? (The mass of a nickel-57 nucleus is

The half-life of ²²³Ra is 11.4 days.How much of a 200.0 mg sample remains after 600 hours?

When an atom of an element undergoes beta decay,its proton count will change by and its neutron count will change by .

When two atoms of ²H are fused to form one atom of ⁴He,the total energy evolved is .What is the total change in mass (in kg)for this reaction?