Question

rutherfords alpha - particle scattering experiment showed that the plum pudding model was incorrect therefore rutherford came up with the nuclear model of an atom. complete the explanations below: during the experiment most of the alpha particles passed straight through the gold sheet which shows that... very few particles were deflected which suggests that... describe j j thomsons plum pudding model of an atom and explain what would happen if alpha particles were fired at atoms (according to the model). rutherfords nuclear model plum pudding model

Explanation:

J J Thomson's plum - pudding model proposed that an atom was a uniform positive sphere with electrons embedded in it. If alpha particles were fired at atoms according to this model, the alpha particles (positively charged) would mostly pass straight through the atom because the positive charge was thought to be evenly distributed and not concentrated. There would be little to deflect the alpha particles. Rutherford's experiment showed that most alpha particles passed straight through the gold sheet which suggested that most of the space inside an atom is empty. The very few deflected particles suggested that there is a small, dense, positively - charged nucleus at the centre of the atom.

Answer:

If alpha particles were fired at atoms according to J J Thomson's plum - pudding model, most alpha particles would pass straight through the atom with little to no deflection because the positive charge was thought to be evenly distributed throughout the atom. Most of the space inside an atom is empty as most alpha particles passed straight through the gold sheet in Rutherford's experiment. The very few deflected particles suggest that there is a small, dense, positively - charged nucleus at the centre of the atom.