Question 1

A 30.0-kg child receives 2.65 × 107 β particles,each with an energy of 4.60 × 10-13 J.If the RBE = 0.78,how many millirem did the child receive?

Accepted Answer

A) 3.2 × 10-7 millirem 
B) 5.2 × 10-7 millirem 
C) 5.2 × 10-4 millirem 
D) 3.2 × 10-2 millirem 
E) None of these choices is correct. 
A) 3.2 × 10-7 millirem 
B) 5.2 × 10-7 millirem 
C) 5.2 × 10-4 millirem 
D) 3.2 × 10-2 millirem 
E) None of these choices is correct.

Question 2

Which isotope,when bombarded with bismuth-209,would yield two neutrons and an isotope with atomic number 121 and mass number 299?

Accepted Answer

A) Pb-211 
B) Po-209 
C) Sr-92 
D) Rn-38 
E) Sr-38 
A) Pb-211 
B) Po-209 
C) Sr-92 
D) Rn-38 
E) Sr-38

Question 3

Identify the missing species in the following nuclear transmutation.   .

Accepted Answer

A)   
B)    
C)    
D)    
E) None of the answers is correct. 
A)   
B)    
C)    
D)    
E) None of the answers is correct.

Question 4

Alpha decay is not observed for isotopes of elements with atomic numbers less than 83.

Accepted Answer

A) True 
 B)False

Question 5

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 6

What is the nuclear binding energy per nucleon for   ? (1 kg = 6.022 × 1026 amu;
C = 2.99792458 × 108 m/s)
Particle Mass (amu)   24.985839   1.007276   1.008665

Accepted Answer

A) 0.214 J/nucleon 
B) 3.20 × 10-11 J/nucleon 
C) 1.28 × 10-12 J/nucleon 
D) 0.999 J/nucleon 
E) 7.35 × 10-11 J/nucleon 
A) 0.214 J/nucleon 
B) 3.20 × 10-11 J/nucleon 
C) 1.28 × 10-12 J/nucleon 
D) 0.999 J/nucleon 
E) 7.35 × 10-11 J/nucleon

Question 7

When atoms of beryllium-9 are bombarded with alpha particles,neutrons are produced.What new isotope is also formed?   .

Accepted Answer

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

Question 8

What is the nuclear binding energy per nucleon of uranium-234? Particle
Mass (amu)
U-234
234)040947
Neutron
1)008701
Proton
1)007316
Electron
0)000549
[1 kg = 6.022 × 1026 amu; NA = 6.022 × 1023 mol-1; c = 2.99792458 × 108 m/s]

Accepted Answer

A) 2.75 × 10-10 J/nucleon 
B) 3.04 × 10-10 J/nucleon 
C) 1.38 × 10-12 J/nucleon 
D) 1.27 × 10-12 J/nucleon 
E) 1.18 × 10-12 J/nucleon 
A) 2.75 × 10-10 J/nucleon 
B) 3.04 × 10-10 J/nucleon 
C) 1.38 × 10-12 J/nucleon 
D) 1.27 × 10-12 J/nucleon 
E) 1.18 × 10-12 J/nucleon

Question 9

An alpha particle is a helium atom.

Accepted Answer

A) True 
 B)False

Question 10

Calcium-39 undergoes positron decay.Each positron carries 5.49 MeV of energy.How much energy will be emitted when 0.00250 mol of calcium-39 decays? (1 MeV = 1.602 × 10-13 J)

Accepted Answer

A) 13.2 kJ 
B) 1.32 × 104 kJ 
C) 1.32 × 106 kJ 
D) 1.32 × 109 kJ 
E) None of these choices is correct. 
A) 13.2 kJ 
B) 1.32 × 104 kJ 
C) 1.32 × 106 kJ 
D) 1.32 × 109 kJ 
E) None of these choices is correct.

Question 11

How old is the oldest object that can reliably be dated using 14C dating?

Accepted Answer

A) 5730 years 
B) 30,000 years 
C) 60,000 years 
D) 10,000 years 
E) There is no limit to how old an object can be. 
A) 5730 years 
B) 30,000 years 
C) 60,000 years 
D) 10,000 years 
E) There is no limit to how old an object can be.

Question 12

A pure sample of tritium,3H,was prepared and sealed in a container for a number of years.Tritium undergoes β decay with a half-life of 12.32 years.How long has the container been sealed if analysis of the contents shows there are 5.25 mol of 3H and 6.35 mol of 3He present?

Accepted Answer

A) 2.34 yr 
B) 3.38 yr 
C) 9.77 yr 
D) 14.1 yr 
E) 25.6 yr 
A) 2.34 yr 
B) 3.38 yr 
C) 9.77 yr 
D) 14.1 yr 
E) 25.6 yr

Question 13

In the following reaction,identify X.   .

Accepted Answer

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

Question 14

Nuclear fission is the process in which a heavy nucleus (mass number > 200)divides to form smaller nuclei of intermediate mass and one or more protons.

Accepted Answer

A) True 
 B)False

Question 15

How many 14C atoms are in a charcoal sample that has a decay rate of 3500 disintegrations per min? (For 14C,t1/2 = 5730 yr.)

Accepted Answer

A) 2.9 × 107 atoms 
B) 8.0 × 10-7 atoms 
C) 1.4 × 1014 atoms 
D) 1.5 × 1013 atoms 
E) 6.02 × 1020 atoms 
A) 2.9 × 107 atoms 
B) 8.0 × 10-7 atoms 
C) 1.4 × 1014 atoms 
D) 1.5 × 1013 atoms 
E) 6.02 × 1020 atoms

Question 16

A rock contains 0.37 mg of Pb-206 and 0.95 mg of U-238.Approximately how many U-238 atoms were in the rock when it was formed billions of years ago? (The half life for 238U → 206Pb is 4.51 × 109 yr.)

Accepted Answer

A) 1.32 atoms 
B) 5.8 × 10-6 atoms 
C) 2.4 × 1018 atoms 
D) 3.3 × 1018 atoms 
E) 3.5 × 1021 atoms 
A) 1.32 atoms 
B) 5.8 × 10-6 atoms 
C) 2.4 × 1018 atoms 
D) 3.3 × 1018 atoms 
E) 3.5 × 1021 atoms

Question 17

Which equation correctly represents positron decay of

Accepted Answer

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

Question 18

What is the nuclear binding energy per nucleon of potassium-40? Particle
Mass (amu)
K-40
39)9632591
Neutron
1)008701
Proton
1)007316
Electron
0)000549
(1 kg = 6.022 × 1026 amu;
NA = 6.022 × 1023 mol-1;
C = 2.99792458 × 108 m/s)

Accepted Answer

A) 1.33 × 10-12 J/nucleon 
B) 5.33 × 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) 1.33 × 10-12 J/nucleon 
B) 5.33 × 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 19

Identify the missing species in the following nuclear transmutation.

Accepted Answer

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

Question 20

All isotopes of elements with atomic numbers higher than 83 (Bi)are radioactive.

Accepted Answer

A) True 
 B)False

Exam 20: Nuclear Chemistry

A 30.0-kg child receives 2.65 × 107 β particles,each with an energy of 4.60 × 10-13 J.If the RBE = 0.78,how many millirem did the child receive?

Which isotope,when bombarded with bismuth-209,would yield two neutrons and an isotope with atomic number 121 and mass number 299?

Identify the missing species in the following nuclear transmutation. .

Alpha decay is not observed for isotopes of elements with atomic numbers less than 83.

A typical radius of an atomic nucleus is about

What is the nuclear binding energy per nucleon for ? (1 kg = 6.022 × 1026 amu; C = 2.99792458 × 108 m/s) Particle Mass (amu) 24.985839 1.007276 1.008665

When atoms of beryllium-9 are bombarded with alpha particles,neutrons are produced.What new isotope is also formed? .

What is the nuclear binding energy per nucleon of uranium-234? Particle Mass (amu) U-234 234)040947 Neutron 1)008701 Proton 1)007316 Electron 0)000549 [1 kg = 6.022 × 1026 amu; NA = 6.022 × 1023 mol-1; c = 2.99792458 × 108 m/s]

An alpha particle is a helium atom.

Calcium-39 undergoes positron decay.Each positron carries 5.49 MeV of energy.How much energy will be emitted when 0.00250 mol of calcium-39 decays? (1 MeV = 1.602 × 10-13 J)

How old is the oldest object that can reliably be dated using 14C dating?

A pure sample of tritium,3H,was prepared and sealed in a container for a number of years.Tritium undergoes β decay with a half-life of 12.32 years.How long has the container been sealed if analysis of the contents shows there are 5.25 mol of 3H and 6.35 mol of 3He present?

In the following reaction,identify X. .

Nuclear fission is the process in which a heavy nucleus (mass number > 200)divides to form smaller nuclei of intermediate mass and one or more protons.

How many 14C atoms are in a charcoal sample that has a decay rate of 3500 disintegrations per min? (For 14C,t1/2 = 5730 yr.)

A rock contains 0.37 mg of Pb-206 and 0.95 mg of U-238.Approximately how many U-238 atoms were in the rock when it was formed billions of years ago? (The half life for 238U → 206Pb is 4.51 × 109 yr.)

Which equation correctly represents positron decay of

What is the nuclear binding energy per nucleon of potassium-40? Particle Mass (amu) K-40 39)9632591 Neutron 1)008701 Proton 1)007316 Electron 0)000549 (1 kg = 6.022 × 1026 amu; NA = 6.022 × 1023 mol-1; C = 2.99792458 × 108 m/s)

Identify the missing species in the following nuclear transmutation.

All isotopes of elements with atomic numbers higher than 83 (Bi)are radioactive.

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A 30.0-kg child receives 2.65 × 10⁷ β particles,each with an energy of 4.60 × 10^-13 J.If the RBE = 0.78,how many millirem did the child receive?

What is the nuclear binding energy per nucleon for ? (1 kg = 6.022 × 10²⁶ amu; C = 2.99792458 × 10⁸ m/s) Particle Mass (amu) 24.985839 1.007276 1.008665

What is the nuclear binding energy per nucleon of uranium-234? Particle Mass (amu) U-234 234)040947 Neutron 1)008701 Proton 1)007316 Electron 0)000549 [1 kg = 6.022 × 10²⁶ amu; N_A = 6.022 × 10²³ mol^-1; c = 2.99792458 × 10⁸ m/s]

Calcium-39 undergoes positron decay.Each positron carries 5.49 MeV of energy.How much energy will be emitted when 0.00250 mol of calcium-39 decays? (1 MeV = 1.602 × 10^-13 J)

How old is the oldest object that can reliably be dated using ¹⁴C dating?

A pure sample of tritium,³H,was prepared and sealed in a container for a number of years.Tritium undergoes β decay with a half-life of 12.32 years.How long has the container been sealed if analysis of the contents shows there are 5.25 mol of ³H and 6.35 mol of ³He present?

How many ¹⁴C atoms are in a charcoal sample that has a decay rate of 3500 disintegrations per min? (For ¹⁴C,t_1/2 = 5730 yr.)

A rock contains 0.37 mg of Pb-206 and 0.95 mg of U-238.Approximately how many U-238 atoms were in the rock when it was formed billions of years ago? (The half life for ²³⁸U → ²⁰⁶Pb is 4.51 × 10⁹ yr.)

What is the nuclear binding energy per nucleon of potassium-40? Particle Mass (amu) K-40 39)9632591 Neutron 1)008701 Proton 1)007316 Electron 0)000549 (1 kg = 6.022 × 10²⁶ amu; N_A = 6.022 × 10²³ mol^-1; C = 2.99792458 × 10⁸ m/s)