The video explains Rutherford's model of the atom, based on his alpha scattering experiment. Rutherford observed that most alpha particles passed through a gold foil, some were deflected, and a few rebounded. This led to the conclusion that atoms have a small, dense, positively charged nucleus, with electrons orbiting around it. The experiment contradicted Thomson's model and introduced the nuclear model of the atom.

Who conducted the experiment that led to the development of a new atomic model?

• J.J. Thomson

• Ernest Rutherford

• Niels Bohr

• Albert Einstein

What was the primary purpose of Rutherford's alpha scattering experiment?

• To measure the mass of atoms

• To study the deflection of alpha particles

• To identify new elements

• To discover electrons

What material was used as the target in Rutherford's alpha scattering experiment?

• Silver

• Copper

• Gold

• Platinum

What was a surprising observation from the alpha scattering experiment?

• Alpha particles changed color

• All alpha particles were absorbed

• Most alpha particles were deflected

• One in 12,000 alpha particles rebounded

What did Rutherford conclude about the space within an atom?

• It is filled with protons

• It is solid

• It is filled with electrons

• It is mostly empty

According to Rutherford, where is the positive charge in an atom concentrated?

• In the electrons

• In the outer shell

• Throughout the atom

• In a small central region

What did Rutherford propose about the mass of an atom?

• It is located in the electron cloud

• It is concentrated in the nucleus

• It is evenly distributed

• It is negligible

How do electrons move around the nucleus according to Rutherford's model?

• In random paths

• In straight lines

• In circular paths

• They do not move

What is the relative size of the nucleus compared to the entire atom?

• Very small compared to the atom

• Equal to the atom

• Half the size of the atom

• Larger than the atom

What is the central positively charged part of an atom called?

• Neutron

• Electron

• Proton

• Nucleus