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1 point
Proton, neutron, electron
Nucleus
contains protons and neutrons
electrons in shells
Atomic number
Mass Number
2 points
2, 8, 8
Isotopes
relative atomic mass is average
particle mass, charge
definition of ion
Periodic table in order of Ar
bond by sharing/swapping e-
3 points
Democritus
Thompson, Rutherford, Chadwick
R.A.M compared to 1/12th C-12
Equation for R.A.M
Atom is 0.1 - 0.5nm big
Quarks
Fission/Fusion
Mostly empty space
How can we work out the mass of different atoms?
Vaporisation- either by vacuum or heat
Ionisation - A beam of electrons knocks electrons off the sample
Acceleration - The cations are accelerated by an electric field
Deflection - A magnetic field deflects the ions. Light ions are deflected more than heavy ions
Detection - the magnetic field is varied until all the different mass particles have been detected
Can you explain this pattern?
When we put organic comopunds into a mass spectrometer they break into fragments. These fragmests can help us identify the molecule
parent ion
Can you identify the different peaks