Question

which model of the atom first introduced the idea of a nucleus?
daltons model
rutherfords model
bohrs model
thomsons model

Explanation:

Rutherford's gold - foil experiment led to his nuclear model, introducing the idea of a small, dense nucleus at the atom's center. Other models like Dalton's considered atoms as indivisible, Thomson's was a plum - pudding model, and Bohr's built on Rutherford's by adding electron orbits.

Answer:

B. Rutherford's model