Atomic Structure and Particle Discovery

The video tutorial discusses the evolution of atomic models, starting with the limitations of early models in explaining atom stability. Niels Bohr's modifications introduced the concept of electrons revolving in stable orbits, akin to planetary motion. The tutorial also covers the discovery of neutrons by James Chadwick, highlighting their role in the atomic nucleus alongside protons. The video concludes with a summary of these key concepts.

What did Bohr compare the structure of atoms to?

• A crystal lattice

• A molecule

• A galaxy

• A solar system

According to Bohr's theory, what are the paths called in which electrons revolve?

• Trajectories

• Orbits

• Circles

• Paths

What determines the stability of an electron's orbit?

• The size of the orbit

• The shape of the orbit

• The energy of the electron

• The speed of the electron

What happens when an electron gains energy?

• It disappears

• It moves to a higher orbit

• It stays in the same orbit

• It moves to a lower orbit

How are electron orbits represented?

• By colors

• By symbols

• By alphabets and numbers

• By shapes

Who discovered the neutron?

• Albert Einstein

• Ernest Rutherford

• Niels Bohr

• James Chadwick

In which year was the neutron discovered?

• 1932

• 1950

• 1920

• 1945

What is the mass of a neutron compared to a proton?

• Variable

• Heavier

• Similar

• Lighter

What are protons and neutrons collectively called?

• Atoms

• Nucleons

• Particles

• Electrons

For what achievement was Chadwick awarded the Nobel Prize in Physics?

• Discovery of the neutron

• Discovery of the atom

• Discovery of the proton

• Discovery of the electron