Filters
Question type
Study Flashcards

Decay of silicon-27 by positron emission yields


A) magnesium-23.
B) sulfur-31.
C) phosphorus-27.
D) silicon-26.
E) aluminum-27.

Correct Answer

verifed

verified

Complete and balance the nuclear equation Complete and balance the nuclear equation . .

Correct Answer

verifed

verified

Petroleum is a fossil fuel containing many different carbon compounds. If the carbon atoms in petroleum have been in the ground for 100 million years, what fraction of the initial 14C atoms is still there? (t1/2 = 5,370 yr)


A) 0
B) 1 * 10-10
C) 5.7 * 10-5
D) 1.0 * 10-3
E) 5.7 * 10-1

Correct Answer

verifed

verified

Radioactive nitrogen-13 has a half-life of 10 minutes. After 40 minutes, how much of this isotope would remain in a sample that originally contained 96 mg?

Correct Answer

verifed

verified

Balance the equation Balance the equation

Correct Answer

verifed

verified

When atoms of aluminum-27 are bombarded with alpha particles, a neutron and an element are produced. The particular isotope formed is When atoms of aluminum-27 are bombarded with alpha particles, a neutron and an element are produced. The particular isotope formed is A) B) C) D) E)


A) When atoms of aluminum-27 are bombarded with alpha particles, a neutron and an element are produced. The particular isotope formed is A) B) C) D) E)
B) When atoms of aluminum-27 are bombarded with alpha particles, a neutron and an element are produced. The particular isotope formed is A) B) C) D) E)
C) When atoms of aluminum-27 are bombarded with alpha particles, a neutron and an element are produced. The particular isotope formed is A) B) C) D) E)
D) When atoms of aluminum-27 are bombarded with alpha particles, a neutron and an element are produced. The particular isotope formed is A) B) C) D) E)
E) When atoms of aluminum-27 are bombarded with alpha particles, a neutron and an element are produced. The particular isotope formed is A) B) C) D) E)

Correct Answer

verifed

verified

The half-life of 14C is 5,730 yr. Assuming some charcoal from a campfire 29,000 years old was found, what fraction of the original C-14 would remain today?


A) 3.0 * 10-2
B) 0.197
C) 3.51
D) 33.3
E) None of these.

Correct Answer

verifed

verified

In the following reaction, identify X. In the following reaction, identify X. A) B) C) D) E)


A) In the following reaction, identify X. A) B) C) D) E)
B) In the following reaction, identify X. A) B) C) D) E)
C) In the following reaction, identify X. A) B) C) D) E)
D) In the following reaction, identify X. A) B) C) D) E)
E) In the following reaction, identify X. A) B) C) D) E)

Correct Answer

verifed

verified

A sample of a radioisotope shows an activity of 999 disintegrations per minute due to beta decay. If after 1.10 years the activity is 952 disintegrations per minute, what is the half-life of this radioisotope?


A) 4.38 * 10-2 yr
B) 11.4 yr
C) 0.25 yr
D) 15.8 yr
E) 9.1 yr

Correct Answer

verifed

verified

What fraction of radioactive atoms remains in a sample after six half-lives?


A) zero
B) 1/6
C) 1/16
D) 1/32
E) 1/64

Correct Answer

verifed

verified

Decay of tin-110 by electron capture yields


A) tin-109.
B) cadmium-106.
C) indium-110.
D) antimony-110.
E) tellurium-114.

Correct Answer

verifed

verified

The only stable isotope of aluminum is aluminum-27. What type of radioactive decay should be expected from The only stable isotope of aluminum is aluminum-27. What type of radioactive decay should be expected from ? A) B) C) D) E) ?


A) The only stable isotope of aluminum is aluminum-27. What type of radioactive decay should be expected from ? A) B) C) D) E)
B) The only stable isotope of aluminum is aluminum-27. What type of radioactive decay should be expected from ? A) B) C) D) E)
C) The only stable isotope of aluminum is aluminum-27. What type of radioactive decay should be expected from ? A) B) C) D) E)
D) The only stable isotope of aluminum is aluminum-27. What type of radioactive decay should be expected from ? A) B) C) D) E)
E) The only stable isotope of aluminum is aluminum-27. What type of radioactive decay should be expected from ? A) B) C) D) E)

Correct Answer

verifed

verified

Showing 101 - 112 of 112

Related Exams

Exam 1

Introduction

153 Questions

Exam 2

Atoms, Molecules, and Ions

141 Questions

Exam 3

Stoichiometry

168 Questions

Exam 4

Reactions in Aqueous Solution

156 Questions

Exam 5

Gases

109 Questions

Exam 6

Energy Relationships in Chemical Reactions

105 Questions

Exam 7

The Electronic Structure of Atoms

115 Questions

Exam 8

The Periodic Table

119 Questions

Exam 9

Chemical Bonding I: the Covalent Bond

118 Questions

Exam 10

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

120 Questions

Exam 11

Introduction to Organic Chemistry

57 Questions

Exam 12

Intermolecular Forces and Liquids and Solids

138 Questions

Exam 13

Physical Properties of Solutions

109 Questions

Exam 14

Chemical Kinetics

114 Questions

Exam 15

Chemical Equilibrium

99 Questions

Exam 16

Acids and Bases

163 Questions

Exam 17

Acid-Base Equilibria and Solubility Equilibria

92 Questions

Exam 18

Thermodynamics

112 Questions

Exam 19

Redox Reactions and Electrochemistry

138 Questions

Exam 20

The Chemistry of Coordination Compounds

76 Questions

Exam 22

Organic Polymerssynthetic and Natural

42 Questions

Show Answer