Question 1

The curie is defined as the radioactive output of 1.00 g of radium-226.Calculate this value in disintegrations per second (the half-life of radium-226 is 1600 years).

Accepted Answer

3.7 * 10<s

Question 2

Heavy elements are more likely to give off $\beta$ radiation.

Accepted Answer

A) True 
 B)False

Question 3

What is the element produced when 83Sr undergoes positron emission?

Accepted Answer

A) Kr 
B) Br 
C) Rb 
D) Zr 
E) Y 
A) Kr 
B) Br 
C) Rb 
D) Zr 
E) Y

Question 4

The decay constant for strontium-90 is 0.0247 y-1.How many grams of strontium-90 remain if 10.0 g decay for exactly 60 years?

Accepted Answer

A) 0.23 g 
B) 0.33 g 
C) 1.48 g 
D) 2.27 g 
E) 7.71 g 
A) 0.23 g 
B) 0.33 g 
C) 1.48 g 
D) 2.27 g 
E) 7.71 g

Question 5

What is the time needed for the activity of a radium-226 source to change from 1.5 Ci to 0.50 Ci? (The half-life of radium-226 is 1.60 * 103 y.)

Accepted Answer

A) 5.33 * 102 y 
B) 1.60 * 103 y 
C) 1.10 * 103 y 
D) 9.36 * 102 y 
E) 2.54 * 103 y 
A) 5.33 * 102 y 
B) 1.60 * 103 y 
C) 1.10 * 103 y 
D) 9.36 * 102 y 
E) 2.54 * 103 y

Question 6

Calculate the energy change when one 235U nucleus undergoes the fission reaction 235U + n $\rightarrow$  142Ba + 92Kr + 2n
The masses needed are 235U,235.04 u; 142Ba,141.92 u; 92Kr,91.92 u; n,1.0087 u.

Accepted Answer

A) -3.2 * 10-28 J 
B) +1.8 * 10-10 J 
C) -1.7 * 10-10 J 
D) +2.9 * 10-11 J 
E) -2.8 * 10-11 J 
A) -3.2 * 10-28 J 
B) +1.8 * 10-10 J 
C) -1.7 * 10-10 J 
D) +2.9 * 10-11 J 
E) -2.8 * 10-11 J

Question 7

The nuclear equation for the disintegration of U-238 produces Th-234.What other nuclide is produced?

Accepted Answer

A) 4He 
B) neutron 
C) positron 
D) 3He 
E) $\beta$ 
A) 4He 
B) neutron 
C) positron 
D) 3He 
E) $\beta$

Question 8

Which of the following nuclei is likely to capture an electron? What is the daughter nuclide produced?

Accepted Answer

A) 9Li and 5He 
B) 41Ca and 41K 
C) 246Am and 246Pu 
D) 80Ge and 80Ga 
E) 24Mg and 5He 
A) 9Li and 5He 
B) 41Ca and 41K 
C) 246Am and 246Pu 
D) 80Ge and 80Ga 
E) 24Mg and 5He

Question 9

A nuclide emits a neutron to form 136I.What is the nuclide?

Accepted Answer

A) 137Te 
B) 137I 
C) 137Cs 
D) 135I 
E) 135Te 
A) 137Te 
B) 137I 
C) 137Cs 
D) 135I 
E) 135Te

Question 10

What nuclide is formed when 211Po undergoes $\alpha$ decay?

Accepted Answer

A) 207Pb 
B) 206Ra 
C) 206Pb 
D) 208Rn 
A) 207Pb 
B) 206Ra 
C) 206Pb 
D) 208Rn

Question 11

The rate of nuclear decay does not depend on temperature.

Accepted Answer

A) True 
 B)False

Question 12

Nuclides that lie above the band of stability are proton rich.

Accepted Answer

A) True 
 B)False

Question 13

The nuclear binding energy for iron-56 is the energy released in the nuclear reaction

Accepted Answer

A) 261H + 30$\beta$ $\rightarrow$  56Fe 
B) 561H $\rightarrow$  56Fe 
C) 55Fe + n $\rightarrow$  56Fe 
D) 261H + 56n $\rightarrow$ 56Fe 
E) 261H + 30n $\rightarrow$  56Fe 
A) 261H + 30$\beta$ $\rightarrow$  56Fe 
B) 561H $\rightarrow$  56Fe 
C) 55Fe + n $\rightarrow$  56Fe 
D) 261H + 56n $\rightarrow$ 56Fe 
E) 261H + 30n $\rightarrow$  56Fe

Question 14

The nuclear binding energy for calcium-40 is the energy released when

Accepted Answer

A) calcium-39 and 1 neutron form calcium-40. 
B) 20 protons and 20 neutrons form calcium-40. 
C) 20 protons and 20 electrons form calcium-20. 
D) 40 neutrons form calcium-40. 
E) 40 protons form calcium-40. 
A) calcium-39 and 1 neutron form calcium-40. 
B) 20 protons and 20 neutrons form calcium-40. 
C) 20 protons and 20 electrons form calcium-20. 
D) 40 neutrons form calcium-40. 
E) 40 protons form calcium-40.

Question 15

Boron neutron capture therapy is used to destroy tumors.In this reaction,10B absorbs a slow neutron to produce 11B*,which produces 7Li and __________ plus high-energy photons.

Accepted Answer

The answer of Boron neutron capture therapy is used to...

Question 16

Using the diagram from question 90,which of the following processes below might a Sm-146 (Z = 62)nucleus undergo to begin to reach stability?

Accepted Answer

A) $\alpha$-particle emission 
B) $\beta$-particle emission 
C) $\alpha$-particle and $\beta$-particle emission 
D) Proton capture 
E) $\beta$-particle emission and electron capture 
A) $\alpha$-particle emission 
B) $\beta$-particle emission 
C) $\alpha$-particle and $\beta$-particle emission 
D) Proton capture 
E) $\beta$-particle emission and electron capture

Question 17

The half-life of strontium-90 is 28.1 years.Calculate the percent of a strontium sample left after 100 years.

Accepted Answer

A) 76% 
B) 0.34% 
C) 63% 
D) 82% 
E) 8.5% 
A) 76% 
B) 0.34% 
C) 63% 
D) 82% 
E) 8.5%

Question 18

What type of particle is emitted in the transformation 
201Pt $\rightarrow$ 201Au

Accepted Answer

A) $\gamma$ particle 
B) positron 
C) No particle is emitted because electron capture occurs. 
D) $\beta$ particle 
E) $\alpha$ particle 
A) $\gamma$ particle 
B) positron 
C) No particle is emitted because electron capture occurs. 
D) $\beta$ particle 
E) $\alpha$ particle

Question 19

Why does the band of stability curve upward at high atomic number?

Accepted Answer

Excess neutrons are

Question 20

When a $\beta$ particle is emitted,the mass number

Accepted Answer

A) decreases by 4. 
B) increases by 1. 
C) decreases by 2. 
D) decreases by 1. 
E) does not change. 
A) decreases by 4. 
B) increases by 1. 
C) decreases by 2. 
D) decreases by 1. 
E) does not change.

The curie is defined as the radioactive output of 1.00 g of radium-226.Calculate this value in disintegrations per second (the half-life of radium-226 is 1600 years).

Heavy elements are more likely to give off $\beta$ radiation.

What is the element produced when ⁸³Sr undergoes positron emission?

The decay constant for strontium-90 is 0.0247 y^-1.How many grams of strontium-90 remain if 10.0 g decay for exactly 60 years?

What is the time needed for the activity of a radium-226 source to change from 1.5 Ci to 0.50 Ci? (The half-life of radium-226 is 1.60 * 10³ y.)

Calculate the energy change when one ²³⁵U nucleus undergoes the fission reaction ²³⁵U + n $\rightarrow$ ¹⁴²Ba + ⁹²Kr + 2n The masses needed are ²³⁵U,235.04 u; ¹⁴²Ba,141.92 u; ⁹²Kr,91.92 u; n,1.0087 u.

The nuclear equation for the disintegration of U-238 produces Th-234.What other nuclide is produced?

Which of the following nuclei is likely to capture an electron? What is the daughter nuclide produced?

A nuclide emits a neutron to form ¹³⁶I.What is the nuclide?

What nuclide is formed when ²¹¹Po undergoes $\alpha$ decay?

The rate of nuclear decay does not depend on temperature.

Nuclides that lie above the band of stability are proton rich.

The nuclear binding energy for iron-56 is the energy released in the nuclear reaction

The nuclear binding energy for calcium-40 is the energy released when

Boron neutron capture therapy is used to destroy tumors.In this reaction,¹⁰B absorbs a slow neutron to produce ¹¹B^*,which produces ⁷Li and __________ plus high-energy photons.

Using the diagram from question 90,which of the following processes below might a Sm-146 (Z = 62)nucleus undergo to begin to reach stability?

The half-life of strontium-90 is 28.1 years.Calculate the percent of a strontium sample left after 100 years.

What type of particle is emitted in the transformation ²⁰¹Pt $\rightarrow$ ²⁰¹Au

Why does the band of stability curve upward at high atomic number?

When a $\beta$ particle is emitted,the mass number

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Exam 18: Nuclear Chemistry

The curie is defined as the radioactive output of 1.00 g of radium-226.Calculate this value in disintegrations per second (the half-life of radium-226 is 1600 years).

Heavy elements are more likely to give off β\betaβ radiation.

What is the element produced when 83Sr undergoes positron emission?

The decay constant for strontium-90 is 0.0247 y-1.How many grams of strontium-90 remain if 10.0 g decay for exactly 60 years?

What is the time needed for the activity of a radium-226 source to change from 1.5 Ci to 0.50 Ci? (The half-life of radium-226 is 1.60 * 103 y.)

Calculate the energy change when one 235U nucleus undergoes the fission reaction 235U + n →\rightarrow→ 142Ba + 92Kr + 2n The masses needed are 235U,235.04 u; 142Ba,141.92 u; 92Kr,91.92 u; n,1.0087 u.

The nuclear equation for the disintegration of U-238 produces Th-234.What other nuclide is produced?

Which of the following nuclei is likely to capture an electron? What is the daughter nuclide produced?

A nuclide emits a neutron to form 136I.What is the nuclide?

What nuclide is formed when 211Po undergoes α\alphaα decay?

The rate of nuclear decay does not depend on temperature.

Nuclides that lie above the band of stability are proton rich.

The nuclear binding energy for iron-56 is the energy released in the nuclear reaction

The nuclear binding energy for calcium-40 is the energy released when

Boron neutron capture therapy is used to destroy tumors.In this reaction,10B absorbs a slow neutron to produce 11B*,which produces 7Li and __________ plus high-energy photons.

Using the diagram from question 90,which of the following processes below might a Sm-146 (Z = 62)nucleus undergo to begin to reach stability?

The half-life of strontium-90 is 28.1 years.Calculate the percent of a strontium sample left after 100 years.

What type of particle is emitted in the transformation 201Pt →\rightarrow→ 201Au

Why does the band of stability curve upward at high atomic number?

When a β\betaβ particle is emitted,the mass number

The Quantum World

Quantum Mechanics in Action: Atoms

Chemical Bonds

Molecular Shape and Structure

The Properties of Gases

Liquids and Solids

Inorganic Materials

Thermodynamics: The First Law

Thermodynamics: The Second and Third Laws

Physical Equilibria

Chemical Equilibria

Acids and Bases

Aqueous Equilibria

Electrochemistry

Chemical Kinetics

The Elements: the Main Group Elements

The Elements: The D Block

Organic Chemistry I

Organic Chemistry II

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Heavy elements are more likely to give off $\beta$ radiation.

What is the element produced when ⁸³Sr undergoes positron emission?

The decay constant for strontium-90 is 0.0247 y^-1.How many grams of strontium-90 remain if 10.0 g decay for exactly 60 years?

What is the time needed for the activity of a radium-226 source to change from 1.5 Ci to 0.50 Ci? (The half-life of radium-226 is 1.60 * 10³ y.)

Calculate the energy change when one ²³⁵U nucleus undergoes the fission reaction ²³⁵U + n $\rightarrow$ ¹⁴²Ba + ⁹²Kr + 2n The masses needed are ²³⁵U,235.04 u; ¹⁴²Ba,141.92 u; ⁹²Kr,91.92 u; n,1.0087 u.

A nuclide emits a neutron to form ¹³⁶I.What is the nuclide?

What nuclide is formed when ²¹¹Po undergoes $\alpha$ decay?

Boron neutron capture therapy is used to destroy tumors.In this reaction,¹⁰B absorbs a slow neutron to produce ¹¹B^*,which produces ⁷Li and __________ plus high-energy photons.

What type of particle is emitted in the transformation ²⁰¹Pt $\rightarrow$ ²⁰¹Au

When a $\beta$ particle is emitted,the mass number