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3 cards from this section. Quick, good the night before a test.
What is relative atomic mass?
Think about how isotopes contribute to the mass of an element.
Calculate the percent abundance if 70% of an element is isotope A and the remaining is isotope B.
The total abundance must equal 100%.
What do we call the average of an element's isotopic masses based on their natural abundances?
Focus on the definition of atomic weight.
Isotopes of a given element have the same number of protons?
Consider the properties of atomic structure.
Two isotopes of an element are found. Isotope A has a mass of 20.0 u and an abundance of 75%. Isotope B has a mass of 22.0 u and an abundance of 25%. Calculate the average atomic mass of the element.
Remember to convert the percentages to fractions.
Discuss how mass spectrometry can be used to identify unknown elements. Provide an example.
Think about why isotopes have distinct patterns in mass spectrometry.
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