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Lesson Worksheet: The Atomic Model Chemistry • 10th Grade

In this worksheet, we will practice describing the differences between historical models of the atom and what drove the development of one model to the next.

Q1:

Which theory of the atom came first: Rutherford’s nuclear model, Bohr’s orbital model, Dalton’s hard sphere model, or Thomson’s plum pudding model?

  • AThomson’s plum pudding model
  • BDalton’s hard sphere model
  • CBohr’s orbital model
  • DRutherford’s nuclear model

Q2:

In the Geiger-Marsden experiments supervised by Ernest Rutherford (known as the Rutherford gold foil experiment), which type of particle was scattered by gold foil, proving that atoms contain dense nuclei?

  • A𝛽 particles
  • B𝛼 particles
  • CNeutrons
  • DGamma rays
  • E𝛽 particles

Q3:

What step forward from Bohr’s orbital model of the atom was made by Schrödinger in his electron cloud model?

  • AThe nucleus contains particles with mass and positive charge.
  • BElectrons are spread out over space.
  • CElectrons are moving within a positively charged sphere.
  • DElectrons occupy shells with fixed radii.
  • EThe nucleus contains particles with mass but no charge.

Q4:

How was the plum pudding model different from the hard-sphere model of the atom?

  • AThe plum pudding model showed electrons making up the corners of a cube.
  • BThe plum pudding model included negatively charged particles known as electrons.
  • CThe plum pudding model included positively charged particles known as protons.
  • DThe plum pudding model described electrons orbiting a central nucleus.
  • EThe plum pudding model showed electrons occupying different energy levels.

Q5:

Which chemist discovered that electrons exist at fixed energy levels?

  • ABohr
  • BThomson
  • CDalton
  • DGeiger and Marsden
  • ERutherford

Q6:

James Chadwick proved the existence of .

  • Athe quantum atomic model
  • Bthe electron cloud model
  • Cthe electron
  • Dthe neutron
  • Ethe proton

Q7:

Which of the following is the new model of the atom that replaced Dalton’s model in 1897?

  • ABohr’s model
  • BModern atomic model
  • CThomson’s model
  • DGeiger’s model
  • ERutherford’s model

Q8:

Which diagram most closely represents Bohr’s electron shell model of the atom?

  • A
  • B
  • C
  • D
  • E

Q9:

Which diagram most closely represents Rutherford’s nuclear or planetary model of the atom?

  • A
  • B
  • C
  • D
  • E

Q10:

Which diagram most closely represents Thomson’s model of the atom?

  • A
  • B
  • C
  • D
  • E

This lesson includes 55 additional questions for subscribers.

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