Sunday Times News: The 'plum pudding' model of the atom was proposed by JJ Thomson, who had also discovered the electron.

The plum pudding model. In 1897, the English born physicist, J J Thomson, ... This 'solar system' model of the atom is the way that most people think about atoms today.

In the plum pudding model, the alpha particles should have just passed straight through the gold atoms, or been deflected a little bit. Photograph of Ernest Rutherford and Hans Geiger with their ...

In 1904, J.J. Thomson proposed the “plum pudding model” of the atom. In this model, the electrons were simply embedded in a jelly-like structure of material that was positively charged.

Everyone at that time imagined the atom as a "plum pudding." That is, it was roughly the same consistency throughout, with negatively-charged electrons scattered about in it like raisins in a pudding.

A period in which the 'plum pudding' model of the atom held sway. Image source, Getty Images. Image caption, Rutherford's discovery was a pivotal moment in modern physics.