Flashcards
Atomic Structure and Mass Spectrometry
Cards in this deck (8)
- 1Mass NumberTotal number of protons and neutrons in the nucleus of one atom of the element
- 2Atomic NumberThe number of protons in the nucleus of an atom
- 3IsotopesAtoms of the same element with the same atomic number but with different mass numbers
- 4Mass SpectroscopyGas or vaporised sample diffuses into the path of electrons fired from an electron gun
The gun fires high energy electrons which knocks an electron out the gaseous particles to form +ve ions - 5Acceleration+ve ions are accelerated by an electric field and focused into a beam by passing them through a series of slits
- 6DeflectionA strong magnetic field is used to deflect the beam of fast moving ions.
The deflection magnitude is dependent on the m/z ration of the ion
small m/z = big deflection - 7DetectionIons in the beam electrically detected
Ion hits detector; accepts electron; creates small electrical current; amplified and produces signal on a computer - 8Relative Atomic MassAverage mass of one atom of an element
1/12 x mass of one atom of C12
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- Masters Degree Physical Chemistry (Atomic Structure) Flashcards on Atomic Structure and Mass Spectrometry, created by Leah McGeorge on 03/04/2015.
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- Leah McGeorge
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