The Plum Pudding Model is a historical scientific theory proposed by J.J. Thomson in 1904 to describe the structure of an atom. According to this model, atoms are composed of a positively charged "pudding" with negatively charged electrons embedded within it, resembling plums in a pudding. This model was an early attempt to explain the distribution of charge within an atom. The Plum Pudding Model was significant in the development of atomic theory but was later replaced by the Rutherford Model after Ernest Rutherford's gold foil experiment in 1911. Rutherford's findings showed that atoms have a dense, positively charged nucleus, leading to a more accurate understanding of atomic structure.