Using general trends, predict the stability of the following nuclei. Drag the appropriate items to their respective bins. > View Available Hint(s) Reset Help cadmium-112 arsenic-82 radium-233 potassium-44 magnesium-24
Using general trends, predict the stability of the following nuclei. Drag the appropriate items to their respective bins. > View Available Hint(s) Reset Help cadmium-112 arsenic-82 radium-233 potassium-44 magnesium-24
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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
Transcribed Image Text:Identification and Characterization of Unstable and Stable Nuclei
Nuclear stability can in general be predicted based on the following
considerations:
• Nuclei with 84 protons or more are unstable.
Nuclei containing a magic number of protons and/or
neutrons tend to be stable.
• Stable nuclei often contain even numbers of protons and/or
neutrons.
These factors are reflected in the given graph (Figure 1), which shows the
valley of stability as a function of number of neutrons and protons.
Figure
110
100
90
sulognau jo zaqung
80
70
60
50
40
30
201
10
0
0
Belt of stability
www.x
N
1:1 neutron-to-
proton ratio
10 20 30 40 50 60 70 80
Number of protons
< 1 of 1 >
"Magic" numbers
A magic number is the name given to certain numbers of protons or neutrons that have a high correlation to stability in nuclei:
magic numbers of protons:
magic numbers of neutrons:
▼
Part A
A plot of the number of neutrons versus the number of protons for all known stable nuclei, represented by reddish brown dots on the graph, shows that these nuclei cluster
together in a region known as the valley of stability. Nuclei with a ratio that is too high tend to undergo beta decay. Nuclei with a ratio that is too low tend to undergo positron
emission or electron capture.
2, 8, 20, 28, 50, 82
2, 8, 20, 28, 50, 82, 126, 184
Using general trends, predict the stability of the following nuclei.
Drag the appropriate items to their respective bins.
▸ View Available Hint(s)
cadmium-112 arsenic-82
Stable
Submit
radium-233 potassium-44 magnesium-24
P
Radioactive
Reset Help
P Pearson
5 of 43
Review | Constants | Periodic Table
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