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Course: AP®︎/College Chemistry > Unit 1

Lesson 2: Mass spectrometry of elements

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Mass spectrometry of elements

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The mass spectrum for an average sample of a pure element is shown below.

Based on the spectrum, which of the following is true about the element?

(Choice A)
The element has an average atomic mass of $24 u$ ‍.
(Choice B)
The element has an average atomic mass between $24$ ‍ and $25 u$ ‍.
(Choice C)
The most abundant isotope of the element has an atomic mass of $26 u$ ‍.
(Choice D)
An average sample of the element contains four different isotopes.

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Isotopes and mass spectrometry