Question 1

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 2

The reaction shown below is responsible for creating 14C in the atmosphere.What is the bombarding

Accepted Answer

A) alpha particle 
B) electron 
C) neutron 
D) positron 
E) proton 
A) alpha particle 
B) electron 
C) neutron 
D) positron 
E) proton

Question 3

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

Accepted Answer

A) The mass number decreases by 4 and the atomic number decreases by 2. 
B) The mass number does not change and the atomic number increases by 1. 
C) The mass number increases by 4 and the atomic number does not change. 
D) The mass number increases by 2 and the atomic number decreases by 1. 
E) The mass number does not change and the atomic number increases by 2. 
A) The mass number decreases by 4 and the atomic number decreases by 2. 
B) The mass number does not change and the atomic number increases by 1. 
C) The mass number increases by 4 and the atomic number does not change. 
D) The mass number increases by 2 and the atomic number decreases by 1. 
E) The mass number does not change and the atomic number increases by 2.

Question 4

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 5

If we start with 1.000 g of strontium-90,0.805 g will remain after 9.00 yr.This means that the   of strontium-90 is ________ yr.

Accepted Answer

A) 7.74 
B) 11.2 
C) 28.8 
D) 7.25 
E) 41.6 
A) 7.74 
B) 11.2 
C) 28.8 
D) 7.25 
E) 41.6

Question 6

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

Accepted Answer

It combines with a p

Question 7

Carbon-11 decays by ________.

Accepted Answer

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

Question 8

Which one of the following natural radionuclides is the most abundant?

Accepted Answer

A) Potassium-40 
B) Rubidium-87 
C) Thorium-232 
D) Uranium-238 
A) Potassium-40 
B) Rubidium-87 
C) Thorium-232 
D) Uranium-238

Question 9

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 10

What is the predominant isotope of uranium?

Accepted Answer

The answer of What is the predominant isotope of uranium?...

Question 11

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 12

The missing reactant from this reaction is ________.

Accepted Answer

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

Question 13

Atoms containing radioactive nuclei are called ________.

Accepted Answer

A) radionuclides 
B) radioisotopes 
C) nucleons 
D) nuclides 
E) radioisophores 
A) radionuclides 
B) radioisotopes 
C) nucleons 
D) nuclides 
E) radioisophores

Question 14

Who is credited with first achieving fission of uranium-235?

Accepted Answer

A) Fermi 
B) Rutherford 
C) Curie 
D) Dalton 
E) Faraday 
A) Fermi 
B) Rutherford 
C) Curie 
D) Dalton 
E) Faraday

Question 15

What are beta particles?

Accepted Answer

high speed electrons

Question 16

The alpha decay of what isotope of what element produces lead-206?

Accepted Answer

A) polonium-210 
B) radon-222 
C) mercury-202 
D) bismuth-208 
E) thallium-204 
A) polonium-210 
B) radon-222 
C) mercury-202 
D) bismuth-208 
E) thallium-204

Question 17

The missing product from this reaction is ________.

Accepted Answer

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

Question 18

The neutron/proton ratio of stable nuclei increases with increasing atomic number.

Accepted Answer

A) True 
 B)False

Question 19

Which type of radioactive decay results in no change in mass number and atomic number for the starting nucleus?

Accepted Answer

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

Question 20

The half-life of 218Po is 3.1 minutes.How much of a 155 gram sample remains after 0.40 hours?

Accepted Answer

A) 0.00067 g 
B) 0.0072 g 
C) 0.72 g 
D) 0.0047 g 
E) none of the above 
A) 0.00067 g 
B) 0.0072 g 
C) 0.72 g 
D) 0.0047 g 
E) none of the above

Exam 21: Nuclear Chemistry

What is a phosphor?

The reaction shown below is responsible for creating 14C in the atmosphere.What is the bombarding

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

Transuranium elements have atomic numbers greater than ________.

If we start with 1.000 g of strontium-90,0.805 g will remain after 9.00 yr.This means that the of strontium-90 is ________ yr.

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

Carbon-11 decays by ________.

Which one of the following natural radionuclides is the most abundant?

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

What is the predominant isotope of uranium?

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

The missing reactant from this reaction is ________.

Atoms containing radioactive nuclei are called ________.

Who is credited with first achieving fission of uranium-235?

What are beta particles?

The alpha decay of what isotope of what element produces lead-206?

The missing product from this reaction is ________.

The neutron/proton ratio of stable nuclei increases with increasing atomic number.

Which type of radioactive decay results in no change in mass number and atomic number for the starting nucleus?

The half-life of 218Po is 3.1 minutes.How much of a 155 gram sample remains after 0.40 hours?

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 reaction shown below is responsible for creating ¹⁴C in the atmosphere.What is the bombarding

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

The half-life of ²¹⁸Po is 3.1 minutes.How much of a 155 gram sample remains after 0.40 hours?