Question

What are the differences between the plum pudding model, nuclear model and the atomic model

Answer 1

The plum pudding diagram models the protons and electrons in an atom and gives evidence of different charges in an atom. The nuclear model was made to prove that the subatomic particles were placed in different places in the atom such as the neutrons and protons being in the nucleus and the electrons on the outer shells. The atomic model, buy Dalton, was made to prove that the atom is always in constant motion and never still in one place. 

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Answer 2

The plum pudding model suggested that the electrons were dispersed throughout the atom (like chocolate chips in a cookie) and the space was positively charged so that in the end the atom was neutral. Today, people know that the electrons are in a "cloud" around the atom and the protons (and neutrons) are in the nucleus, at the center of the atom.