We know the fundamental particles of the atom. Now let us see, how these particles are arranged in an atom to suggest a model of the atom.
Thomson’s Model :
J.J. Thomson, in 1904, proposed that there was an equal and opposite positive charge enveloping the electrons in a matrix.
This model is called the plum – pudding model after a type of Victorian dissert in which bits of plums were surrounded by matrix of pudding.
This model could not satisfactorily explain the results of scattering experiment carried out by Rutherford who worked with Thomson.