Mass Spectrometry Quiz

1.
Lunar craters are usually named after scientists and explorers. One of the craters on the Moon is named after a prominent scientist in the field of mass spectrometry. Who is named after?
- Francis William Aston
- Wolfgang Paul
- John Bennett Fenn
Your answer:

Correct answer:

Aston is a 44-kilometer lunar impact crater located along the northwestern limb of the Moon. The crater was named in honor of Francis W. Aston.
2.
Who made molecular elephants fly?
- John B. Fenn
- Joseph J. Thomson
- W. and O. Wright
Your answer:

Correct answer:

John Fenn was awarded Nobel Prize in Chemistry in 2002 for his work related to electrospray ionization of biological macromolecules. His famous phrase, "we made elephants fly" refers to the ability of electrospray to generate gas-phase ions from big protein molecules.
3.
What is the trajectory of a charged particle moving parallel to a uniform electric field in a vacuum?
- The particle follows a curved path and continues to follow this path until it forms a complete circle
- Neither the trajectory nor the velocity of the particle changes
- The particle either accelerates or decelerates, depending on the field direction and the particle charge sign
Your answer:

Correct answer:

If a positive charge is moving in the same direction as the electric field vector the particle's velocity will increase. If it is moving in the opposite direction it will decelerate. If a negative charge is moving in the same direction as the electric field vector the particle will decelerate. If it is moving in the opposite direction it will accelerate.
4.
Which mass spectrometer was carried by the American spacecraft Viking 1 sent to the planet Mars in 1975?
- Double-focusing mass spectrometer
- Time-of-flight mass spectrometer
- Quadrupole mass spectrometer
Your answer:

Correct answer:

Viking 1 carried two mass spectrometers, both equipped with double-focusing analyzers and electron ionization sources. The first spectrometer with a Mattauch-Herzog geometry was designed by Alfred Nier; it was intended to analyze the upper atmosphere of Mars. The second one with a Nier- Johnson geometry was part of the GC/MS apparatus designed by Klaus Biemann. It was used to analyze the regolith and the atmosphere at the landing site.
5.
How long would be a paper needed for printing a profile mass spectrum measured in the m/z 0 1000 range at a resolution of 50,000 at m/z 500 if the peaks were to be 1 mm wide at their half maximum? Let us consider a constant width of all peaks.
- 1 m
- 10 m
- 100 m
Your answer:

Correct answer:

The resolution can be expressed as (m/z)/Δ(m/z), where Δ (m/z) is the peak width at 50 % of its maximum. For a resolution of 50,000 at m/z 500, the value of Δ(m/z) is 0.01. If the Δ(m/z) is to correspond to 1 mm, then the total width of the spectral record equals 1000/0.01 mm, which is 100,000 mm, which is 100 m.
6.
What is the base peak in the mass spectrum?
- The peak with the greatest m/z value
- The peak from which fragments are formed
- The peak that has the greatest intensity
Your answer:

Correct answer:

The base peak is the peak with the greatest intensity among all peaks in the spectrum. The intensity of each peak in the spectrum is expressed as a percentage relative to the intensity of the base peak.
7.
Joseph John Thomson (1856 - 1940), Nobel laureate in physics, is credited with the invention of the mass spectrometer, the discovery of the electron and isotopes of stable elements. A lesser-known fact is his father's profession. What was it?
- Electrical engineer
- Owner of an antiquarian bookshop
- Circus ringmaster
Your answer:

Correct answer:

His father, Joseph James Thomson, ran an antiquarian bookshop founded by Thomson’s great-grandfather. [Wikipedia]
8.
Chemical ionization (CI) is a soft ionization technique used in mass spectrometry. Who discovered it?
- Burnaby Munson and Frank H. Field
- Michael Barber
- Hans-Dieter Beckey
Your answer:

Correct answer:

Chemical ionization was discovered in the laboratories of the Humble Oil and Refining Company in Baytown, TX. Munson and Field’s seminal paper on chemical ionization was published in 1966. [https://doi.org/10.1021/ja00964a001]
9.
What principle of positive ray detection was used in the first Thomson's parabola spectrographs?
- Phosphorescence of willemite
- Darkening of a photographic plate
- Charge detection using an electrometer
Your answer:

Correct answer:

In the spectrographs used by Thomson until 1910, the rays of positive electricity were detected by the phosphorescence they produced on a willemite screen. The screen was made by grinding rare zinc mineral willemite into a fine powder. After shaking in alcohol, the suspension was allowed to deposit slowly on a glass plate. Later, a photographic plate inside the spectrograph was used for more sensitive detection.
10.
What is the electric charge of an ion with m/z = m?
- 1 C
- 1.602 176 634 x 10^-19 C
- 1 eV
Your answer:

Correct answer:

The particle carries one elementary charge, the value of which is 1.602 176 634 × 10⁻¹⁹ C (exactly).

Mass Spectrometry Quiz

Mass Spectrometry Quiz

Thank you for taking our quiz!

1.
Lunar craters are usually named after scientists and explorers. One of the craters on the Moon is named after a prominent scientist in the field of mass spectrometry. Who is named after?

2.
Who made molecular elephants fly?

3.
What is the trajectory of a charged particle moving parallel to a uniform electric field in a vacuum?

4.
Which mass spectrometer was carried by the American spacecraft Viking 1 sent to the planet Mars in 1975?

5.
How long would be a paper needed for printing a profile mass spectrum measured in the m/z 0 1000 range at a resolution of 50,000 at m/z 500 if the peaks were to be 1 mm wide at their half maximum? Let us consider a constant width of all peaks.

6.
What is the base peak in the mass spectrum?

7.
Joseph John Thomson (1856 - 1940), Nobel laureate in physics, is credited with the invention of the mass spectrometer, the discovery of the electron and isotopes of stable elements. A lesser-known fact is his father's profession. What was it?

8.
Chemical ionization (CI) is a soft ionization technique used in mass spectrometry. Who discovered it?

9.
What principle of positive ray detection was used in the first Thomson's parabola spectrographs?

10.
What is the electric charge of an ion with m/z = m?

Czech Museum
of Mass Spectrometry

Our partners

Mass Spectrometry Quiz

Mass Spectrometry Quiz

Thank you for taking our quiz!

1. Lunar craters are usually named after scientists and explorers. One of the craters on the Moon is named after a prominent scientist in the field of mass spectrometry. Who is named after?

2. Who made molecular elephants fly?

3. What is the trajectory of a charged particle moving parallel to a uniform electric field in a vacuum?

4. Which mass spectrometer was carried by the American spacecraft Viking 1 sent to the planet Mars in 1975?

5. How long would be a paper needed for printing a profile mass spectrum measured in the m/z 0 1000 range at a resolution of 50,000 at m/z 500 if the peaks were to be 1 mm wide at their half maximum? Let us consider a constant width of all peaks.

6. What is the base peak in the mass spectrum?

7. Joseph John Thomson (1856 - 1940), Nobel laureate in physics, is credited with the invention of the mass spectrometer, the discovery of the electron and isotopes of stable elements. A lesser-known fact is his father's profession. What was it?

8. Chemical ionization (CI) is a soft ionization technique used in mass spectrometry. Who discovered it?

9. What principle of positive ray detection was used in the first Thomson's parabola spectrographs?

10. What is the electric charge of an ion with m/z = m?

Czech Museumof Mass Spectrometry

Our partners

1.
Lunar craters are usually named after scientists and explorers. One of the craters on the Moon is named after a prominent scientist in the field of mass spectrometry. Who is named after?

2.
Who made molecular elephants fly?

3.
What is the trajectory of a charged particle moving parallel to a uniform electric field in a vacuum?

4.
Which mass spectrometer was carried by the American spacecraft Viking 1 sent to the planet Mars in 1975?

5.
How long would be a paper needed for printing a profile mass spectrum measured in the m/z 0 1000 range at a resolution of 50,000 at m/z 500 if the peaks were to be 1 mm wide at their half maximum? Let us consider a constant width of all peaks.

6.
What is the base peak in the mass spectrum?

7.
Joseph John Thomson (1856 - 1940), Nobel laureate in physics, is credited with the invention of the mass spectrometer, the discovery of the electron and isotopes of stable elements. A lesser-known fact is his father's profession. What was it?

8.
Chemical ionization (CI) is a soft ionization technique used in mass spectrometry. Who discovered it?

9.
What principle of positive ray detection was used in the first Thomson's parabola spectrographs?

10.
What is the electric charge of an ion with m/z = m?

Czech Museum
of Mass Spectrometry