Question

3 compare the plum pudding model (left) of the atom to the nuclear model (right) of the atom. what is the main difference between these two atomic models? 4 think about the charge of the alpha particles being shot at the gold foil. what were they bumping into (protons, neutrons, or electrons) that caused them to deflect into different directions?

Explanation:

1. In the plum - pudding model, positive charge is uniformly distributed throughout the atom, while in the nuclear model, positive charge is concentrated in a small nucleus.
2. Alpha particles are positively charged. When they are deflected, it is due to repulsion from positive charges. Since protons are positively charged, it is the protons that cause the deflection of positively - charged alpha particles when they are shot at the gold foil.

Answer:

1. In the plum - pudding model, positive charge is spread evenly; in the nuclear model, positive charge is in the nucleus.
2. Protons.