Question

what did rutherfords model of the atom include that thomsons model did not have?
o a nucleus
o energy levels
o electron clouds
o smaller particles

Explanation:

Thomson's model (plum - pudding model) had electrons embedded in a positive sphere. Rutherford's model proposed a small, dense, positively - charged nucleus at the center of the atom with electrons orbiting around it. Energy levels were not part of Rutherford's original model. Electron clouds came later with quantum mechanics. Smaller particles like sub - atomic particles were not what differentiated Rutherford's and Thomson's models in this context. The key difference was the nucleus.

Answer:

A. a nucleus