Mass Spectrometry Concepts and Applications

Teacher Tan explains mass spectrometry, detailing how it identifies components and their relative abundances. The video covers the functionality of a mass spectrometer, including ionization, acceleration, and detection processes. It also explains how to interpret mass spectrum data to determine isotopic abundance and calculate average atomic mass, using magnesium as an example.

What is the primary purpose of using a mass spectrometer?

• To identify the components and their relative abundance in a substance

• To determine the color of a substance

• To calculate the density of a substance

• To measure the temperature of a substance

Which of the following is NOT a component of a mass spectrometer?

• Electron beam

• Sample compartment

• Thermometer

• Magnetic field

How are ions separated in a mass spectrometer?

• By their volume

• By their color

• By their temperature

• By their mass-to-charge ratio

What information can be obtained from a mass spectrum?

• The boiling point of the sample

• The number of isotopes present

• The density of the sample

• The color of the sample

In the example of magnesium, how many naturally occurring isotopes are there?

• Three

• Two

• Five

• Four

What is the first step in calculating the average atomic mass of an element?

• Calculating the density

• Determining the color of the element

• Constructing a table with isotopic mass and abundance

• Measuring the temperature

If isotopic masses are not provided, what assumption can be made?

• Assume isotopic mass equals the atomic number

• Assume isotopic mass equals the nucleon number

• Assume isotopic mass equals the electron number

• Assume isotopic mass equals the neutron number

What should be used if the exact isotopic mass is provided?

• The exact mass

• The nucleon number

• The electron number

• The atomic number

What can be used as a measure of abundance in a mass spectrum?

• Volume

• Color

• Temperature

• Relative intensity

What is the average atomic mass of magnesium as calculated in the video?

• 25.32

• 26.32

• 23.32

• 24.32