-
100
Thales of miletus
Thales of Miletus began the Atomic theory when he believed everyone should know the nature around them and that there was an explination for all natural phenomina -
John Dalton
John Dalton created the periodic table when he theorised that every element was made of unique atoms and the atoms of an element are all the same. he theorised that chemical reaction are caused by the union and seperation of these atoms. -
J.J. Thompson
while investigating thermiotic emissions discovered a subatomic particle common to all matter and discovered the electron -
Ernest Ruthford
Ernest Ruthford's theory began when he bombarded gold foil with helium nuclei and noticed most went through unaffected while Aproximately 1 out of 8000 were deflected in all direction and sometimes right back. he concluded that in order for the occasional deflections the gold contained a tiny positively charged centre surrounded by negative particles and that matter is only empty space. -
Niels Bohr
Niels Bohr theorised that the electrons orbiting the nucleus of an atom can only have certain discrete energies and each element has different electron energies. he also theorised that the orbits were defined by their "Angular Momentum". -
Erwin Schrodinger
Erwin formed a model of an atom as ineracting waves.