Average Atomic Mass

Flashcard
•
Science
•
10th Grade
•
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 abundance.
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.
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, affecting the overall average mass.
5.
FLASHCARD QUESTION
Front
If an isotope has a mass of 10 amu and makes up 50% of the sample, what is its contribution to the average atomic mass?
Back
5 amu (10 amu * 0.50).
6.
FLASHCARD QUESTION
Front
What is the average atomic mass of an element with two isotopes: 75 amu (25% abundance) and 76 amu (75% abundance)?
Back
75.75 amu (0.25*75 + 0.75*76).
7.
FLASHCARD QUESTION
Front
What does amu stand for?
Back
Atomic Mass Unit, a standard unit of mass that quantifies mass on an atomic or molecular scale.
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