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Mass Spectrometer
Separates particles based on their mass according to IB chemistry curriculum,
- Vaporisation – heat to turn the substance into a gas
- Ionisation – by bombardment of high energy electrons to knock out an electron to form a positive ion
- Acceleration – by an electric field
- Deflection – by a magnetic field
- Detection – of ions
The Relative Atomic Mass of an element is the average mass of the naturally occurring isotopes of an element, relative to the mass of 1/12 of an atom of carbon-12.
In IB Chemistry, you should know that:
- To calculate the Relative Average Atomic Mass of different isotopes of an element, times the mass and abundance together of each isotope, add them together and divide by 100
- To calculate the Natural Abundance of different isotopes of an element, use the same equation but use x as the percentage abundance for one element and 100-x for the percentage abundance of the other. This over 100 = the average atomic mass that they should give you. Then rearrange this to find x, the percentage abundance of the first isotope. Subtract x from 100 to find the abundance of the other isotope
End of this topic!
Drafted by Gina (Chemistry)