Rutherford Atomic Model

1. What was the primary contribution of Ernest Rutherford in the field of atomic theory?

• He discovered the electron

• He proposed the Plum Pudding model

• He established the Nuclear model of the atom

• He invented radium

According to the Plum Pudding model, how are electrons arranged in an atom?

• In circular orbits around the nucleus

• Embedded in a positively charged cloud

• Randomly scattered throughout the atom

• Fixed in place within the nucleus

What surprising result did Rutherford find in his gold foil experiment?

• Most alpha particles were absorbed by the gold foil

• Most alpha particles passed through with little deflection

• All alpha particles were deflected back

• A significant number of particles bounced back at large angles

What did Rutherford name the dense center of the atom?

• Proton

• Electron cloud

• Nucleus

• Plum pudding

What limitation did Rutherford’s Nuclear model have according to classical electrodynamics?

• It could not explain the line spectrum of an atom

• It suggested atoms are all solid

• It proposed that protons orbit randomly

• It did not account for the presence of neutrons