Final answer:
In the plum pudding model, the charge found in the center of the atom that kept the electron attached to it was a positive charge.
Step-by-step explanation:
In the plum pudding model of the atom, the charge found in the center of the atom that kept the electron attached to it was a positive charge. The positive matter in the atom was thought to be like a diffused cloud or jelly that occupied the atom's space, and the electrons were embedded in it like fruits in a plum pudding dessert dish.
As the electrons got closer to the outer portion of the atom, the positive charge in that region was greater than the neighboring negative charges, which caused the electron to be pulled back toward the center region of the atom.