Answers

2014-07-15T16:14:18+08:00
Based on stock knowledge i know three:
1) Thomson's model- dicovered by J.J.Thomson. the model is also known as "plum-pudding model" wherein the electrons are located inside a proton it was discovered in 1904
2) Quantum mechanical model- discovered by Max Planck (date unknown) wherein electrons don't have an orbit but revolve under an electron cloud where they could be possibly found
3) Bohr's model-discovered by Neils Bohr wherein electrons have orbits and they orbit around a positively charged nucleus (date unknown)
4) Rutherford Model- discovered by Ernest Rutherford in 1909 where in it is similar to Bohr's model only that the electrons don't have orbits
 
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