Who proposed the Atomic Theory in 1803?

• John Dalton

• Niels Bohr

• Ernest Rutherford

• J.J. Thomson

According to Dalton, what are atoms?

• Energy packets

• Waves

• Indivisible solid particles

• Divisible particles

What did J.J. Thomson discover through his experiments with cathode rays?

• Electrons

• Neutrons

• Nucleus

• Protons

What model did Thomson propose to explain his observations?

• Planetary model

• Quantum mechanical model

• Nuclear model

• Plum pudding model

What was the key finding of Rutherford's gold foil experiment?

• Atoms are indivisible

• Atoms are mostly empty space with a small, dense nucleus

• Electrons orbit the nucleus in fixed paths

• Atoms are made of waves

What did Rutherford's model fail to explain?

• The mass of the nucleus

• The behavior of electrons in empty space

• The existence of protons

• The charge of the nucleus

What solution did Niels Bohr propose for the collapsing atom problem?

• Electrons are found in the nucleus

• Atoms are made of waves

• Atoms are indivisible

• Electrons are found in fixed orbits around the nucleus

In Bohr's model, what determines the energy level of an electron?

• The size of the nucleus

• The distance from the nucleus

• The number of protons

• The number of neutrons

What term is used to describe the discrete energy change when an electron jumps between levels?

• Wave function

• Energy packet

• Quantum leap

• Photon

What will be discussed in the next video?

• Rutherford's Nuclear Model

• Quantum Mechanical Model

• Thomson's Electron Discovery

• Dalton's Atomic Theory