Rutherford Scattering PhET

In the simulation, change the energy of the incoming alpha particles and observe the scattering patterns. What happens to the scattering angle of the alpha particles as the energy of the incoming particles increases?

• The scattering angle increases.

• The scattering angle decreases.

• The scattering angle stays the same.

• The alpha particles stop scattering.

Tags

NGSS.HS-PS3-5

In the simulation, observe the paths of the alpha particles as they interact with the nucleus. What happens to the alpha particles that approach the nucleus directly head-on?

• They are scattered at small angles.

• They pass through the nucleus without scattering.

• They are deflected at large angles.

• They stop moving completely.

Tags

NGSS.HS-PS3-5

In the simulation, observe how changing the speed of the incoming alpha particles affects the scattering. What happens to the scattering angle when the speed of the alpha particles is increased?

• The scattering angle increases.

• The scattering angle decreases.

• The scattering angle stays the same.

• The alpha particles stop scattering.

How did the results of Rutherford’s experiment challenge the earlier plum pudding model of the atom? Explain why the results supported the nuclear model instead.

How did Rutherford’s experiment provide evidence for the existence of a small, dense nucleus in the atom?

Tags

NGSS.HS-PS1-8

Why do most alpha particles pass straight through the foil, while only a small number are deflected?