Exploring Atomic Theory: A Historical Perspective

Who first proposed the idea that matter is composed of indivisible particles?

• Aristotle

• John Dalton

• Democritus

• Niels Bohr

What did Aristotle believe matter was composed of?

• Particles

• Four elements

• Cells

• Atoms

What significant theory did John Dalton propose about atomic composition?

• Atoms are divisible

• Atoms do not combine

• Atoms combine in variable proportions

• Atoms combine in fixed proportions

Who discovered the electron?

• Niels Bohr

• John Dalton

• J.J. Thompson

• Ernest Rutherford

What model did Ernest Rutherford propose?

• Bohr Model

• Nuclear Model

• Planetary Model

• Quantum Model

According to Niels Bohr, electrons orbit the nucleus at:

• Random energies

• Fixed energies

• Increasing energies

• Decreasing energies

What principle did Werner Heisenberg introduce?

• Certainty Principle

• Probability Principle

• Uncertainty Principle

• Definiteness Principle

What does the modern quantum model suggest about electron location?

• Electrons have fixed orbits

• Electrons exist in specific locations

• Electrons move randomly

• Electrons have probable locations

What phenomenon is used to celebrate atomic theory, as mentioned in the video?

• Sound waves

• Lightning

• Fireworks

• Laser shows

Who was satisfied to have been proven correct about the atomic theory after millennia?

• John Dalton

• Ernest Rutherford

• Democritus

• Niels Bohr