Discovering the Atom's Nucleus

What was the atomic model before Rutherford's experiment?

• Bohr Model

• Quantum Mechanical Model

• Electron Cloud Model

• Plum Pudding Model

What did scientists initially think the atom looked like?

• A peach

• A watermelon

• A blueberry muffin

• A chocolate chip cookie

What did Rutherford's gold foil experiment use as a target?

• Gold foil

• Copper foil

• Aluminum foil

• Silver foil

What was a surprising result of the gold foil experiment?

• Alpha particles passed straight through.

• Alpha particles were absorbed.

• Some alpha particles were deflected.

• Alpha particles turned into beta particles.

Why were some alpha particles deflected in Rutherford's experiment?

• They hit the dense nucleus.

• They hit other alpha particles.

• They passed through electrons.

• They were attracted to the nucleus.

What conclusion did Rutherford draw from his experiment?

• Atoms are solid spheres.

• Atoms are mostly empty space.

• Electrons are in the nucleus.

• Protons orbit the nucleus.

What did the gold foil experiment reveal about the nucleus?

• It is positively charged.

• It is negatively charged.

• It contains only neutrons.

• It is located outside the atom.

What subatomic particle was discovered in the 1930s?

• Neutron

• Proton

• Positron

• Electron

What did the gold foil experiment disprove?

• Dalton's Model

• Plum Pudding Model

• Quantum Mechanical Model

• Bohr Model

What was Rutherford's expectation regarding the alpha particles' behavior?

• They would all be deflected.

• They would all pass through.

• They would all be absorbed.

• They would transform into different particles.