1) Three isotopes of Silicon occur in nature: Isotopes of Silicon: Silicon-28 Silicon-29 Silicon-30 Atomic Mass: 27.97693 amu 28.97649 amu Percent Abundance: 92.23% 4.68% 3.09% 29.97377 amu Calculate the average atomic mass for the three isotopes of Silicon.

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
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Calculating Average Atomic Mass Worksheet:
1) Three isotopes of Silicon occur in nature:
Isotopes of Silicon:
Silicon-28
Atomic Mass:
27.97693 amu
Percent Abundance:
92.23%
Silicon-29
4.68%
28.97649 amu
Silicon-30
3.09%
29.97377 amu
Calculate the average atomic mass for the three isotopes of Silicon.
2) Two isotopes of Rubidium occur naturally:
Isotopes of Rubidium:
Rubidium-85
Rubidium-87
Percent Abundance:
72.15%
27.85%
Atomic Mass:
84.9118 amu
86.9092 amu
Calculate the average atomic mass for the two isotopes of Rubidium.
3) Only two isotopes of Copper naturally occur:
Isotopes of Copper:
Copper-63
Copper-65
Percent Abundance:
Atomic Mass:
69.17%
62.9396 amu
30.83%
64.9278 amu
Calculate the average atomic mass for the two isotopes of Copper.
Transcribed Image Text:Calculating Average Atomic Mass Worksheet: 1) Three isotopes of Silicon occur in nature: Isotopes of Silicon: Silicon-28 Atomic Mass: 27.97693 amu Percent Abundance: 92.23% Silicon-29 4.68% 28.97649 amu Silicon-30 3.09% 29.97377 amu Calculate the average atomic mass for the three isotopes of Silicon. 2) Two isotopes of Rubidium occur naturally: Isotopes of Rubidium: Rubidium-85 Rubidium-87 Percent Abundance: 72.15% 27.85% Atomic Mass: 84.9118 amu 86.9092 amu Calculate the average atomic mass for the two isotopes of Rubidium. 3) Only two isotopes of Copper naturally occur: Isotopes of Copper: Copper-63 Copper-65 Percent Abundance: Atomic Mass: 69.17% 62.9396 amu 30.83% 64.9278 amu Calculate the average atomic mass for the two isotopes of Copper.
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