Average Atomic Mass
Flashcard
•
Science
•
10th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is average atomic mass?
Back
The weighted average of the masses of an element's isotopes, taking into account their relative abundances.
2.
FLASHCARD QUESTION
Front
How do you calculate average atomic mass from isotopes?
Back
Multiply the mass of each isotope by its relative abundance (as a decimal), then sum these values.
3.
FLASHCARD QUESTION
Front
If an isotope has a mass of 4 amu and is 30% abundant, what is its contribution to the average atomic mass?
Back
0.30 * 4 amu = 1.2 amu.
4.
FLASHCARD QUESTION
Front
What is the average atomic mass of an element with two isotopes: 10.013 amu (19.9% abundance) and 11.01 amu (80.1% abundance)?
Back
10.812 amu.
5.
FLASHCARD QUESTION
Front
What is the significance of isotopes in calculating average atomic mass?
Back
Isotopes have different masses and abundances, which affect the overall average atomic mass of an element.
6.
FLASHCARD QUESTION
Front
What does it mean for an element to have isotopes?
Back
Isotopes are variants of the same element that have the same number of protons but different numbers of neutrons.
7.
FLASHCARD QUESTION
Front
How can you identify isotopes of the same element?
Back
Isotopes of the same element have the same atomic number but different mass numbers.
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