Atomic Theory Quiz

Who proposed the first scientific atomic theory stating that all matter is made of indivisible atoms?

• J.J. Thomson

• John Dalton

• Niels Bohr

• Ernest Rutherford

What is the main feature of Thomson's atomic model?

• Electrons orbit the nucleus

• Atoms are indivisible

• Electrons are embedded in a positively charged "pudding"

• Electrons are in energy levels

Rutherford's gold foil experiment led to the discovery of:

• Electrons

• Protons

• Nucleus

• Neutrons

In Bohr's atomic model, electrons:

• Are stationary inside the nucleus

• Move in fixed energy levels or orbits

• Are scattered randomly in a cloud

• Are embedded in positive matter

The discovery of neutrons was made by:

• James Chadwick

• Ernest Rutherford

• Niels Bohr

• John Dalton

Which model is often called the "planetary model"?

• Dalton's model

• Rutherford's model

• Bohr's model

• Thomson's model

Which statement best describes the Quantum Mechanical Model?

• Electrons move in fixed circular paths

• Electrons behave as both particles and waves

• Atoms are indivisible

• Positive matter surrounds electrons

Dalton's theory included all of the following except:

• Atoms of the same element are identical

• Atoms combine in simple ratios to form compounds

• Atoms contain protons, neutrons, and electrons

• Atoms are indivisible

Which experiment disproved Thomson's "plum pudding" model?

• Cathode ray tube experiment

• Gold foil experiment

• Oil drop experiment

• Photoelectric effect

A student observes that electrons do not follow exact paths but exist in regions called orbitals. This observation supports which model?

• Bohr's model

• Quantum Mechanical Model

• Rutherford's model

• Dalton's model