Isotopes and Calculating Atomic Mass

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•
Chemistry
•
10th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
What is an isotope?
Back
Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons, resulting in different atomic masses.
2.
FLASHCARD QUESTION
Front
How do you calculate the average atomic mass of an element?
Back
To calculate the average atomic mass, multiply the atomic mass of each isotope by its percent abundance (as a decimal), then sum these values.
3.
FLASHCARD QUESTION
Front
What is the mass number of an atom?
Back
The mass number is the total number of protons and neutrons in an atom's nucleus.
4.
FLASHCARD QUESTION
Front
What does the atomic number represent?
Back
The atomic number represents the number of protons in the nucleus of an atom and determines the element's identity.
5.
FLASHCARD QUESTION
Front
How many protons are in the isotope Titanium-48?
Back
Titanium-48 has 22 protons.
6.
FLASHCARD QUESTION
Front
What is the percent abundance of an isotope?
Back
Percent abundance is the relative amount of a particular isotope of an element compared to the total amount of all isotopes of that element, expressed as a percentage.
7.
FLASHCARD QUESTION
Front
If an isotope has a mass of 39.946 amu and a percent abundance of 4.35%, how do you include it in the average atomic mass calculation?
Back
Multiply 39.946 amu by 0.0435 (the decimal form of 4.35%) to find its contribution to the average atomic mass.
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