Week 6

Question 1

Mass spectrometer

Answer 1

used to confirm the existence of isotopes

most elements exist in several isotopic forms

Question 2

Mass spectrum

Answer 2

Data recorded as a mass spectrum which is a graph of the relative mass of isotopes.
Calibrated on the ^12C scale
plotted against the percentage abundance

Question 3

RIM

Answer 3

relative mass of isotopes

Question 4

Information obtained from the mass spectrum

Answer 4

1. mass of each isotope (RIM- x axis)
2. percentage abundance of each isotope (y axis)
3. number of isotopes (number of peaks)
4. average relative masses for the elements (RAM can be calculated from mass spectra)

Question 5

Calculations of percentage abundance using the spectrum

Answer 5

% abundance= peak height / total peak height x100

Question 6

Calculations of RAM using the spectrum

Answer 6

E(RIMX100%)/

100