Introduction to Mass Spectrometry

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Questions and Answers

What happens when molecules in gas state are bombarded with high energy electrons?

They gain an electron and form a radical cation
They break down into smaller molecules
They lose an electron and form a molecular ion (M+) (correct)
They remain unchanged

What does mass spectrometry provide information about?

Physical state of the molecule
Isotopic composition of the molecule
Chemical reactions of the molecule
Exact molecular weight and molecular formula (correct)

What does the intensity of each signal in mass spectrometry represent?

Molecular weight of the cations
Relative abundance of the radicals
Molecular weight of the radicals
Relative abundance of the cations (correct)

What is a molecular ion (M+)?

<p>A radical cation with a positive charge and one unpaired electron, representing the mass of the original molecule (D)</p> Signup and view all the answers

What is separated by magnetic deflection in mass spectrometry?

<p>Cations based on their (m/z) ratio (C)</p> Signup and view all the answers

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Study Notes

Mass Spectrometry

When molecules in a gas state are bombarded with high-energy electrons, they break into charged particles called ions.
Mass spectrometry provides information about the mass-to-charge ratio of ions, which helps identify the structure of molecules.