Question 1

Carbon-11, fluorine-18, oxygen-15 and nitrogen-13 are all used in the clinical diagnostic technique known as __________.

Accepted Answer

positron e

Question 2

When two atoms of 2H are fused to form one atom of 4He, the total energy evolved is 3.83 × 10-12 J. What is the total change in mass (in kg)for this reaction? (C = 3.00 × 108 m/s)

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 3

Transuranium elements have atomic numbers greater than __________.

Accepted Answer

A) 90 
B) 91 
C) 92 
D) 93 
E) 94 
A) 90 
B) 91 
C) 92 
D) 93 
E) 94

Question 4

What exposure level to radiation is fatal to most humans?

Accepted Answer

A) 100 rem 
B) 200 rem 
C) 600 rem 
D) 300 rem 
E) 1000 rem 
A) 100 rem 
B) 200 rem 
C) 600 rem 
D) 300 rem 
E) 1000 rem

Question 5

The missing product from this reaction is __________.   B + _____ →   N +   n

Accepted Answer

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

Question 6

What was the purpose of the Manhattan project?

Accepted Answer

to build a

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

A freshly prepared sample of curium-243 undergoes 3312 disintegrations per second. After 6.00 yr, the activity of the sample declines to 2755 disintegrations per second. The half-life of curium-243 is __________ yr.

Accepted Answer

A) 4.99 
B) 32.6 
C) 7.21 
D) 0.765 
E) 22.6 
A) 4.99 
B) 32.6 
C) 7.21 
D) 0.765 
E) 22.6

Question 9

The nuclear disintegration series of __________ is the source of radon-222 in soil.

Accepted Answer

A) "235U" 
B) "238U" 
C) "236Pb" 
D) "235Th" 
E) "14C" 
A) "235U" 
B) "238U" 
C) "236Pb" 
D) "235Th" 
E) "14C"

Question 10

What happens to the mass number and the atomic number of an element when it undergoes beta decay?

Accepted Answer

A) Neither the mass number nor the atomic number change. 
B) The mass number decreases by 4 and the atomic number decreases by 2. 
C) The mass number does not change and the atomic number increases by 1. 
D) The mass number does not change and the atomic number decreases by 2. 
E) The mass number increases by 2 and the atomic number increases by 1. 
A) Neither the mass number nor the atomic number change. 
B) The mass number decreases by 4 and the atomic number decreases by 2. 
C) The mass number does not change and the atomic number increases by 1. 
D) The mass number does not change and the atomic number decreases by 2. 
E) The mass number increases by 2 and the atomic number increases by 1.

Question 11

What is the source of the tremendous energies produced by nuclear reactions?

Accepted Answer

conversion

Question 12

The largest number of stable nuclei have an __________ number of protons and an __________ number of neutrons.

Accepted Answer

A) even, even 
B) odd, odd 
C) even, odd 
D) odd, even 
E) even, equal 
A) even, even 
B) odd, odd 
C) even, odd 
D) odd, even 
E) even, equal

Question 13

The product of the nuclear reaction in which 28Si is subjected to neutron capture followed by alpha emission is __________.

Accepted Answer

A) "31S" 
B) "33S" 
C) "23Mg" 
D) "25Mg" 
E) "25Al" 
A) "31S" 
B) "33S" 
C) "23Mg" 
D) "25Mg" 
E) "25Al"

Question 14

Carbon-11 decays by __________.

Accepted Answer

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

Question 15

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 16

Strontium-90 is a byproduct in nuclear reactors fueled by the radioisotope uranium-235. The half-life of strontium-90 is 28.8 yr. What percentage of a strontium-90 sample remains after 75.0 yr?

Accepted Answer

A) 68.1 
B) 16.5 
C) 7.40 
D) 38.4 
E) 2.60 
A) 68.1 
B) 16.5 
C) 7.40 
D) 38.4 
E) 2.60

Question 17

What happens to the atomic mass number and the atomic number of a radioisotope when it undergoes alpha emission?

Accepted Answer

The mass number drop

Question 18

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

Exam 21: Nuclear Chemistry

Carbon-11, fluorine-18, oxygen-15 and nitrogen-13 are all used in the clinical diagnostic technique known as __________.

When two atoms of 2H are fused to form one atom of 4He, the total energy evolved is 3.83 × 10-12 J. What is the total change in mass (in kg)for this reaction? (C = 3.00 × 108 m/s)

Transuranium elements have atomic numbers greater than __________.

What exposure level to radiation is fatal to most humans?

The missing product from this reaction is __________. B + _____ → N + n

What was the purpose of the Manhattan project?

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

A freshly prepared sample of curium-243 undergoes 3312 disintegrations per second. After 6.00 yr, the activity of the sample declines to 2755 disintegrations per second. The half-life of curium-243 is __________ yr.

The nuclear disintegration series of __________ is the source of radon-222 in soil.

What happens to the mass number and the atomic number of an element when it undergoes beta decay?

What is the source of the tremendous energies produced by nuclear reactions?

The largest number of stable nuclei have an __________ number of protons and an __________ number of neutrons.

The product of the nuclear reaction in which 28Si is subjected to neutron capture followed by alpha emission is __________.

Carbon-11 decays by __________.

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

Strontium-90 is a byproduct in nuclear reactors fueled by the radioisotope uranium-235. The half-life of strontium-90 is 28.8 yr. What percentage of a strontium-90 sample remains after 75.0 yr?

What happens to the atomic mass number and the atomic number of a radioisotope when it undergoes alpha emission?

What is a phosphor?

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

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When two atoms of ²H are fused to form one atom of ⁴He, the total energy evolved is 3.83 × 10^-12 J. What is the total change in mass (in kg)for this reaction? (C = 3.00 × 10⁸ m/s)

The missing product from this reaction is ______. B + _ → N + n

The largest number of stable nuclei have an number of protons and an number of neutrons.

The product of the nuclear reaction in which ²⁸Si is subjected to neutron capture followed by alpha emission is __________.