What is apple pie pudding model of atom?

The Apple pie pudding model of the atom is a historical concept that describes the atom as a uniform sphere of positively charged "dough" with negatively charged electrons (represented as "Apples") embedded within it, similar to raisins in a pudding. This model was proposed by J.J. Thomson in the early 20th century following his discovery of the electron. It was a significant step in atomic theory but was later replaced by the more accurate Rutherford and Bohr models, which introduced a nucleus and defined electron orbits.