What scientist was responsible for the raisin-in-a-bun model?

The raisin-in-a-bun model was proposed by the American scientist J.J. Thomson in 1904. This model describes the atom as a positively charged "bun" with negatively charged electrons (the "raisins") embedded within it. Thomson's model aimed to explain the structure of the atom before more accurate models, such as Rutherford's, were developed.