Question 1

The initial element used to make cobalt-60 for cancer radiation therapy is ________.

Accepted Answer

The answer of The initial element used to make cobalt-60...

Question 2

The half-life of cobalt-60 is 5.20 yr. How many milligrams of a 2.000-mg sample remain after 9.50 years?

Accepted Answer

A) 0.565 
B) 7.03 × 10-22 
C) 7.076 
D) 1.095 
E) 1.435 
A) 0.565 
B) 7.03 × 10-22 
C) 7.076 
D) 1.095 
E) 1.435

Question 3

The mass of a proton is 1.00728 amu and that of a neutron is 1.00867 amu. What is the mass defect (in amu)of a   Co nucleus? (The mass of a cobalt-60 nucleus is 59.9338 amu.)

Accepted Answer

A) 27.7830 
B) 0.5489 
C) 0.5405 
D) 0.0662 
E) 0.4827 
A) 27.7830 
B) 0.5489 
C) 0.5405 
D) 0.0662 
E) 0.4827

Question 4

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

Accepted Answer

A)    e 
B)    β 
C)    e 
D)    e 
E)    β 
A)    e 
B)    β 
C)    e 
D)    e 
E)    β

Question 5

How many neutrons are emitted when a californium-249 nucleus (Z=98)is bombarded with a nitrogen-15 nucleus to produce a   Db nucleus?

Accepted Answer

A) two 
B) three 
C) four 
D) one 
E) zero 
A) two 
B) three 
C) four 
D) one 
E) zero

Question 6

Cesium-131 has a half-life of 9.7 days. What percent of a cesium-131 sample remains after 62 days?

Accepted Answer

A) 1.2 % 
B) 100 % 
C) 0 % 
D) 99 % 
E) 62% 
A) 1.2 % 
B) 100 % 
C) 0 % 
D) 99 % 
E) 62%

Question 7

In the nuclear transmutation represented by   N(   n,   p)?, what is the product?

Accepted Answer

A) carbon-12 
B) carbon-16 
C) carbon-14 
D) nitrogen-16 
E) nitrogen-15 
A) carbon-12 
B) carbon-16 
C) carbon-14 
D) nitrogen-16 
E) nitrogen-15

Question 8

At approximately what number of protons, or neutrons, does the 1:1 ratio of protons to neutrons start to produce unstable nuclei?

Accepted Answer

A) 10 
B) 20 
C) 30 
D) 50 
E) 80 
A) 10 
B) 20 
C) 30 
D) 50 
E) 80

Question 9

What order process is radioactive decay?

Accepted Answer

A) zeroth 
B) first 
C) second 
D) third 
E) fourth 
A) zeroth 
B) first 
C) second 
D) third 
E) fourth

Question 10

In terms of binding energy per nucleon, what element divides fission and fusion processes?

Accepted Answer

A) H 
B) He 
C) C 
D) Fe 
E) U 
A) H 
B) He 
C) C 
D) Fe 
E) U

Question 11

When an isotope undergoes electron capture, what happens to the captured electron?

Accepted Answer

It combines with a p

Question 12

What is a phosphor?

Accepted Answer

A) an oxide of phosphorus 
B) a substance that thermally reduces to phosphorus 
C) a bioluminescent substance 
D) a substance that emits light when excited by radiation 
E) an alkali metal phosphide 
A) an oxide of phosphorus 
B) a substance that thermally reduces to phosphorus 
C) a bioluminescent substance 
D) a substance that emits light when excited by radiation 
E) an alkali metal phosphide

Question 13

The missing product from this reaction is ________.   Cl + _____ →   Ar +   e

Accepted Answer

A)    He 
B)    e 
C)    n 
D)    e 
E)    γ 
A)    He 
B)    e 
C)    n 
D)    e 
E)    γ

Question 14

Bombardment of uranium-235 with a neutron generates tellurium-135, 3 neutrons, and ________.

Accepted Answer

A) zirconium-98. 
B) krypton-101. 
C) krypton-103. 
D) strontium-99. 
E) zirconium-99. 
A) zirconium-98. 
B) krypton-101. 
C) krypton-103. 
D) strontium-99. 
E) zirconium-99.

Question 15

When living tissue is irradiated most of the energy is absorbed by ________.

Accepted Answer

The answer of When living tissue is irradiated most of...

Question 16

210Pb has a half-life of 22.3 years and decays to produce 206Hg. If you start with 7.52 g of 210Pb, how many grams of 206Hg 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 17

The half-life of carbon-11 is 20.3 minutes. How much of a 100.0 mg sample remains after 1.50 hours?

Accepted Answer

A) 8.48 mg 
B) 4.63 mg 
C) 12.9 mg 
D) 22.6 mg 
E) 7.70 mg 
A) 8.48 mg 
B) 4.63 mg 
C) 12.9 mg 
D) 22.6 mg 
E) 7.70 mg

Question 18

Which one of the following devices converts radioactive emissions to light for detection?

Accepted Answer

A) Geiger counter 
B) photographic film 
C) scintillation counter 
D) radiotracer 
E) none of the above 
A) Geiger counter 
B) photographic film 
C) scintillation counter 
D) radiotracer 
E) none of the above

Question 19

Which one of the following is not true concerning radon?

Accepted Answer

A) It decays by alpha emission. 
B) It decays to polonium-218, an alpha emitter. 
C) It is chemically active in human lungs. 
D) It has been implicated in lung cancer. 
E) It is generated as uranium decays. 
A) It decays by alpha emission. 
B) It decays to polonium-218, an alpha emitter. 
C) It is chemically active in human lungs. 
D) It has been implicated in lung cancer. 
E) It is generated as uranium decays.

Question 20

The missing product from this reaction is ________.   I →   Te + _____

Accepted Answer

A)    He 
B)    e 
C)    n 
D)    e 
E)    γ 
A)    He 
B)    e 
C)    n 
D)    e 
E)    γ

Exam 21: Nuclear Chemistry

The initial element used to make cobalt-60 for cancer radiation therapy is ________.

The half-life of cobalt-60 is 5.20 yr. How many milligrams of a 2.000-mg sample remain after 9.50 years?

The mass of a proton is 1.00728 amu and that of a neutron is 1.00867 amu. What is the mass defect (in amu)of a Co nucleus? (The mass of a cobalt-60 nucleus is 59.9338 amu.)

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

How many neutrons are emitted when a californium-249 nucleus (Z=98)is bombarded with a nitrogen-15 nucleus to produce a Db nucleus?

Cesium-131 has a half-life of 9.7 days. What percent of a cesium-131 sample remains after 62 days?

In the nuclear transmutation represented by N( n, p)?, what is the product?

At approximately what number of protons, or neutrons, does the 1:1 ratio of protons to neutrons start to produce unstable nuclei?

What order process is radioactive decay?

In terms of binding energy per nucleon, what element divides fission and fusion processes?

When an isotope undergoes electron capture, what happens to the captured electron?

What is a phosphor?

The missing product from this reaction is ________. Cl + _____ → Ar + e

Bombardment of uranium-235 with a neutron generates tellurium-135, 3 neutrons, and ________.

When living tissue is irradiated most of the energy is absorbed by ________.

210Pb has a half-life of 22.3 years and decays to produce 206Hg. If you start with 7.52 g of 210Pb, how many grams of 206Hg will you have after 15.8 years?

The half-life of carbon-11 is 20.3 minutes. How much of a 100.0 mg sample remains after 1.50 hours?

Which one of the following devices converts radioactive emissions to light for detection?

Which one of the following is not true concerning radon?

The missing product from this reaction is ________. I → Te + _____

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

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 missing product from this reaction is ____. Cl + _ → Ar + e

²¹⁰Pb has a half-life of 22.3 years and decays to produce ²⁰⁶Hg. If you start with 7.52 g of ²¹⁰Pb, how many grams of ²⁰⁶Hg will you have after 15.8 years?

The missing product from this reaction is ____. I → Te + _