What is the significance of the average atomic mass on the periodic table?

Exploring Average Atomic Mass Concepts

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Chemistry
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6th - 10th Grade
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Medium

Ethan Morris
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
It represents the mass of the heaviest isotope.
It is the mass of the lightest isotope.
It is the mass of the most abundant isotope.
It is a weighted average of all naturally occurring isotopes.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is the average atomic mass defined?
As the sum of the masses of all isotopes.
As the mass of the most common isotope.
As the mass of a single atom.
As a weighted average of the mass numbers of all naturally occurring isotopes.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does a weighted average take into account?
The number of protons in the isotopes.
The percent abundance of the isotopes.
The number of neutrons in the isotopes.
The chemical properties of the isotopes.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What tool is used to generate a mass spectrum?
Spectrophotometer
X-ray diffractometer
Mass spectrometer
Electron microscope
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are the two stable isotopes of carbon?
Carbon-13 and Carbon-14
Carbon-12 and Carbon-13
Carbon-11 and Carbon-12
Carbon-12 and Carbon-14
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the percent abundance of Carbon-12 in nature?
99%
1%
50%
100%
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you calculate the average atomic mass?
By multiplying the mass of each isotope by its percent abundance and summing the results.
By dividing the mass of the heaviest isotope by the number of isotopes.
By adding the masses of all isotopes.
By averaging the masses of the two most abundant isotopes.
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