Rutherford and Marsden: The Nuclear Model Of an Atom:
- Fired a beam of alpha particles at thin gold foil.
- Most went through but the occasional one came straight back at them.
- Realised that most of the mass of the atom was centered at the nucleus.
- Showed that most of an atom was empty space.
PROTON: MASS 1, CHARGE +1
NEUTRON: MASS 1, CHARGE 0
ELECTRON: MASS 1/2000(v.small), CHARGE -1
- Atoms have no overall charge
- Number of protons is equal to the number…