What does the term 'respectively' mean in the context of isotope masses?

Calculating Atomic Mass: Practice Problems and Solutions

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Chemistry
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6th - 10th Grade
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Hard

Lucas Foster
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The first mass corresponds to the first isotope mentioned, and the second mass to the second isotope.
The masses are listed in reverse order.
The masses are not related to the isotopes mentioned.
The masses are averaged together.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the mass of Gallium 69?
68.926 amu
60.11 amu
69.72 amu
70.925 amu
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you express the percent abundance of Gallium 69 as a decimal?
0.6011
60.11
0.3989
39.89
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the average atomic mass of Gallium?
68.926 amu
70.925 amu
69.72 amu
60.11 amu
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which isotope of Rubidium is more abundant based on its atomic weight?
Rubidium 85
Rubidium 87
Cannot be determined
Both are equally abundant
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the atomic mass of Rubidium 85?
86.909 amu
85.47 amu
84.911 amu
87.000 amu
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is the atomic weight of Rubidium closer to 85.47 amu?
Because the atomic weight is an average of 85 and 87
Because Rubidium 85 is more abundant
Because Rubidium 87 is more abundant
Because both isotopes are equally abundant
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