Mass Spectrometry Quiz

1.
List these compounds according to their increasing mass: hydrazine (H4N2), oxygen (O2), methanol (CH4O).
- Hydrazine, oxygen, methanol
- Methanol, hydrazine, oxygen
- Oxygen, methanol, hydrazine
Your answer:

Correct answer:

The monoisotopic masses of these compounds are 31.989829 Da (oxygen), 32.026215 Da (methanol), and 32.037448 Da (hydrazine).
2.
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]
3.
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.
4.
How many elements of the periodic table have only a single stable isotope?
- 0
- 15
- 26
Your answer:

Correct answer:

These so-called monoisotopic elements are beryllium, fluorine, sodium, aluminum, phosphorus, scandium, vanadium, manganese, cobalt, arsenic, rubidium, yttrium, niobium, rhodium, indium, iodine, cesium, lanthanum, praseodymium, europium, terbium, holmium, thulium, lutecium, rhenium, and gold.
5.
What is the trajectory of a charged particle moving perpendicularly to a uniform magnetic field in a vacuum?
- The particle follows a curved path and continues to follow this path until it forms a complete circle
- The particle follows a helical path
- The particle follows a straight line and accelerates
Your answer:

Correct answer:

The magnetic force is perpendicular to the velocity so that it does no work on the charged particle. The particle’s kinetic energy and speed thus remain constant. The direction of motion is affected but not the speed.
6.
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.
7.
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.
8.
Which element has the largest number of stable isotopes?
- Molybdenum
- Tin
- Ytterbium
Your answer:

Correct answer:

Naturally occurring tin is a mixture of its ten stable isotopes and they are found in the percentages as follows: ¹¹²Sn (1.0 %), ¹¹⁴Sn (0.7 %), ¹¹⁵Sn (0.3 %), ¹¹⁶Sn (14.5 %), ¹¹⁷Sn (7.7 %), ¹¹⁸Sn (24.2 %), ¹¹⁹Sn (8.6 %), ¹²⁰Sn (32.6 %), ¹²²Sn (4.6 %), and ¹²⁴Sn (5.8 %). Molybdenum has six stable isotopes, ytterbium seven.
9.
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.
10.
John Zeleny was an American physicist whose work laid the theoretical foundations of electrospray ionization. He was born in 1872 into a family of immigrants from Europe. Where did his family come from?
- Slovakia
- Czechia
- Poland
Your answer:

Correct answer:

The parents of John Zelený, Antonín Zelený and Josefa Pitková, came from Křídla, a small village near Žďár nad Sázavou in Austria-Hungary (now the Czech Republic).

Mass Spectrometry Quiz

Mass Spectrometry Quiz

Thank you for taking our quiz!

1.
List these compounds according to their increasing mass: hydrazine (H4N2), oxygen (O2), methanol (CH4O).

2.
Chemical ionization (CI) is a soft ionization technique used in mass spectrometry. Who discovered it?

3.
What is the base peak in the mass spectrum?

4.
How many elements of the periodic table have only a single stable isotope?

5.
What is the trajectory of a charged particle moving perpendicularly to a uniform magnetic field in a vacuum?

6.
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.

7.
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?

8.
Which element has the largest number of stable isotopes?

9.
Who made molecular elephants fly?

10.
John Zeleny was an American physicist whose work laid the theoretical foundations of electrospray ionization. He was born in 1872 into a family of immigrants from Europe. Where did his family come from?

Czech Museum
of Mass Spectrometry

Our partners

Mass Spectrometry Quiz

Mass Spectrometry Quiz

Thank you for taking our quiz!

1. List these compounds according to their increasing mass: hydrazine (H4N2), oxygen (O2), methanol (CH4O).

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

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

4. How many elements of the periodic table have only a single stable isotope?

5. What is the trajectory of a charged particle moving perpendicularly to a uniform magnetic field in a vacuum?

6. 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.

7. 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?

8. Which element has the largest number of stable isotopes?

9. Who made molecular elephants fly?

10. John Zeleny was an American physicist whose work laid the theoretical foundations of electrospray ionization. He was born in 1872 into a family of immigrants from Europe. Where did his family come from?

Czech Museumof Mass Spectrometry

Our partners

1.
List these compounds according to their increasing mass: hydrazine (H4N2), oxygen (O2), methanol (CH4O).

2.
Chemical ionization (CI) is a soft ionization technique used in mass spectrometry. Who discovered it?

3.
What is the base peak in the mass spectrum?

4.
How many elements of the periodic table have only a single stable isotope?

5.
What is the trajectory of a charged particle moving perpendicularly to a uniform magnetic field in a vacuum?

6.
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.

7.
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?

8.
Which element has the largest number of stable isotopes?

9.
Who made molecular elephants fly?

10.
John Zeleny was an American physicist whose work laid the theoretical foundations of electrospray ionization. He was born in 1872 into a family of immigrants from Europe. Where did his family come from?

Czech Museum
of Mass Spectrometry