If a rock contains 75% lead 206 (Pb206) and 25% uranium 238 (U238), how old is the rock? Explain how you determined the answer. Is it possible to have a rock of that age on Earth, and what is the reason for your answer?
If a rock contains 75% lead 206 (Pb206) and 25% uranium 238 (U238), how old is the rock? Explain how you determined the answer. Is it possible to have a rock of that age on Earth, and what is the reason for your answer?
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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Question
Using the page from the Chart of the Nuclides, select a nuclide that is radioactive and decays (changes) to another nuclide by emitting an alpha particle. Is the new element radioactive and if it is, how do you know that? If the new nuclide is radioactive, what does it decay to?
Do the same thing with a nuclide that emits a beta particle.
If a rock contains 75% lead 206 (Pb206) and 25% uranium 238 (U238), how old is the rock? Explain how you determined the answer.
Is it possible to have a rock of that age on Earth, and what is the reason for your answer?
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Pa226
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5.1 mis
a 8.01, 8.18
0,85 s
a 7.49, 7.41,-
y 194.5, 40.7,
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a 7.25, 7.20
1.8 m
a 6.86, 6.82,.
a 8.54, 8:33,**
222.0237
E 2.83
226.02793
223.0240
Th222
2.2 ms
a 7.980
224.0256
225.0261
Th223(5/+)
Th225(3/+
8.72 m
a 6.479, 6.441,
6.501,-
y 322, 246, 359,..
Th224
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1.7 ms
a 8.146, 8.471,
0.65 s
a 7.29, 7.32
y 140.0 w,
1.05 s
a 7.17, 7.00,-..
y 176,
É 0.67
225.02394
222.01845
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221.01817
223.02080
224.02146
Ac222 1
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26.4 ms
« 7.85, 7.61,
7.68,
y 133.0, 342.7,
160.0,
2.7 h
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a 6,81,
6.75,
6.89,
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2.1 m
a 6.646, 6.661,
y 191.3 w, 73, 99,
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52 ms
a 7.64, 7.44,
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a 7.010,
y 215.8, 131,5,...
a 6.1383, 6.056,...
y 25 -376 w
6.97
220.0148
221.0156
222.01783
223.01913
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a 5.7164, 5.607,
y 269.4, 154.2,
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38 s
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21 ms
a 7.867, a 7.314,-
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14.3 m
B- 1.72, 1.92,-
y 206.2, 111.1,
27.4 s
a 6.677, 6.633,
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160.73,
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220.012313
22 ms
a 7.62,
7.68,
7.66,*
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4.8 m
a 6.341, 6.127,
y 218.2,--
1 ms
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y 169.9 -517.0 w
y 187,
117,
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218.00756
219,00924
221.01425
E203
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0.6 ms
a 7.741,
Rn219 5/+
An
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6.425,-
y 271.23, 401.81,-
Rn220
Tn
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y 549.7
Rn218
Rn221
55.6 s
25 m
35 ms
a 7.133,--
y 609.3 w
3,96 s
B-.83,
y 186.4,-..
a 6.037,
y 254, 265
E 1,1
221.0155
< 0.2
217.00391
218 005586
219.009475
220.011384"
Transcribed Image Text:Pa222
Pa223
Pa224
Pa225
Pa226
-3 ms
5.1 mis
a 8.01, 8.18
0,85 s
a 7.49, 7.41,-
y 194.5, 40.7,
153.0,:
1.8 s
a 7.25, 7.20
1.8 m
a 6.86, 6.82,.
a 8.54, 8:33,**
222.0237
E 2.83
226.02793
223.0240
Th222
2.2 ms
a 7.980
224.0256
225.0261
Th223(5/+)
Th225(3/+
8.72 m
a 6.479, 6.441,
6.501,-
y 322, 246, 359,..
Th224
Th221
1.7 ms
a 8.146, 8.471,
0.65 s
a 7.29, 7.32
y 140.0 w,
1.05 s
a 7.17, 7.00,-..
y 176,
É 0.67
225.02394
222.01845
Ac221
221.01817
223.02080
224.02146
Ac222 1
Ac223(5/-) Ac224 0
Ac220
26.4 ms
« 7.85, 7.61,
7.68,
y 133.0, 342.7,
160.0,
2.7 h
63 s
a 6,81,
6.75,
6.89,
7.00,-
IT ?
2.1 m
a 6.646, 6.661,
y 191.3 w, 73, 99,
84,..
52 ms
a 7.64, 7.44,
5's
a 7.010,
y 215.8, 131,5,...
a 6.1383, 6.056,...
y 25 -376 w
6.97
220.0148
221.0156
222.01783
223.01913
E 1.403
Ra223 37+
AcX 11.435 d
a 5.7164, 5.607,
y 269.4, 154.2,
323.9,
Ra219 7/+
Ra221
Ra222
Ra220
18 ms
a 7.45,T
465
29 s
38 s
0.010 s
a 7.678, 7.988,---
y 315.82,...
a 6.608,
a 6.556,..
6.758, 6.669, y 324.2,
y 90., 152,.
ôy 13E1, ô 0.7
223.018497 O
219.01007
220.01101
221.01391 O
222.01536
Fr219 9/-
21 ms
a 7.867, a 7.314,-
(8-)Fr218 (1
Fr220
Fr2215/(-
Fr222 2
14.3 m
B- 1.72, 1.92,-
y 206.2, 111.1,
27.4 s
a 6.677, 6.633,
6.573,
y 44.60, 105.88,
160.73,
B- w
220.012313
22 ms
a 7.62,
7.68,
7.66,*
IT ?
y 145, 111,-
4.8 m
a 6.341, 6.127,
y 218.2,--
1 ms
...
y 169.9 -517.0 w
y 187,
117,
304,.
218.00756
219,00924
221.01425
E203
Rn217 9/ +
0.6 ms
a 7.741,
Rn219 5/+
An
a 6.8193, 6.553,
6.425,-
y 271.23, 401.81,-
Rn220
Tn
a 6.2882,..
y 549.7
Rn218
Rn221
55.6 s
25 m
35 ms
a 7.133,--
y 609.3 w
3,96 s
B-.83,
y 186.4,-..
a 6.037,
y 254, 265
E 1,1
221.0155
< 0.2
217.00391
218 005586
219.009475
220.011384
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