Plum Pudding Model - GCSE Chemistry Definition

The Plum Pudding Model is an early scientific idea about the structure of the atom, proposed by J.J. Thomson in 1904. In this model, the atom is described as a sphere of positive charge with small, negatively charged electrons embedded throughout, like plums in a pudding. The positive charge is spread evenly across the atom, and the electrons balance this charge, making the atom neutral overall. Although later disproven by Rutherford’s nuclear model, the Plum Pudding Model was a significant step forward, as it was one of the first attempts to explain atomic structure.