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Natural abundances of isotopes are measured with an instrument called a mass:
ASpeedometer
BSphygmometer
CSpirometer
DSpectrometer
Answer & Solution
Correct answer: D. Spectrometer
1. Isotopes of an element differ in mass.
2. The instrument separates them by that mass.
3. It is a mass spectrometer.
_Source: OpenStax Chemistry 2e, Chapter 2, Atoms, Molecules, and Ions._
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