Calculating Average Atomic Mass 2024
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?
Back
Multiply the mass of each isotope by its relative abundance (as a decimal), then sum these values.
3.
FLASHCARD QUESTION
Front
What is an isotope?
Back
Atoms of the same element that have the same number of protons but different numbers of neutrons, resulting in different masses.
4.
FLASHCARD QUESTION
Front
What is the significance of relative abundance in calculating average atomic mass?
Back
Relative abundance indicates how common each isotope is in nature, affecting the average atomic mass.
5.
FLASHCARD QUESTION
Front
If an isotope has a relative abundance of 100%, what is its contribution to average atomic mass?
Back
It contributes its full mass to the average atomic mass since it is the only isotope present.
6.
FLASHCARD QUESTION
Front
Calculate the average atomic mass of an element with isotopes: 75% of 10 amu and 25% of 12 amu.
Back
Average atomic mass = (0.75 * 10) + (0.25 * 12) = 10.5 amu.
7.
FLASHCARD QUESTION
Front
What is the average atomic mass of an element with isotopes: 50% of 20 amu and 50% of 30 amu?
Back
Average atomic mass = (0.50 * 20) + (0.50 * 30) = 25 amu.
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