Test on Mass Spectrometer

1. Who invented mass Spectrometer? [1]

2. What element was he working on? [1]

3. Define isotopes. [3]

4. On what principal does it work? [4]

5. List main parts [7]

6. How are ions formed? [6]

7. What factors are important in separating ions? [2]

8. What must happen to the sample before it is introduced? [1]

9. Draw a mass Spectrum and label the axes. [4]

10. Label the diagram [15]

Test on Mass Spectrometer with answers

1. Who invented mass Spectrometer? [1] Aston

2. What element was he working on? [1] Ne

3. Define isotopes. [3] Same atomic number / different mass number / due to different umbers of neutrons

4. On what principal does it work? [4] +ve ions / separated by mass / when moving / in magnetic field

5. List main parts [7] inlet / ionisation chamber / accelerator / separator (analyser) / detector / amplifier/ display

6. How are ions formed? [6] high energy electron / hits atom / knocks off electron / forms +ve ion / X + e- = X+ + 2 e- (2)

7. What factors are important in separating ions? [4] mass of the ions / heavier bent least / strength of magnetic field / stronger field bends more

8. What must happen to the sample before it is introduced? [1] vaporised

9. Draw a mass Spectrum and label the axes. [5] Abundance on y axis / mass on x axis / 2 bars of different heights

10. Label the diagram of mass spectrometer [15]