Atomic Models Lesson Assignment

Which model of the atom is known as the "Billiard Ball" model?

• Thomson's model

• Rutherford's model

• Dalton's model

• Chadwick's model

The discovery of negatively charged particles (electrons) was made by:

• Dalton

• Thomson

• Rutherford

• Chadwick

In Thomson's "Plum Pudding" model, what represents the "pudding"?

• Electrons

• Protons

• Neutrons

• Diffuse positive charge

Why did Rutherford conclude that atoms were mostly empty space?

• The cathode ray experiment showed it

• Most alpha particles passed straight through the gold foil

• The particles were all deflected

• The neutrons took up little space

Thomson's model of the atom consisted of negatively charged ________ embedded in a diffuse positive charge.

Rutherford's model is sometimes called the ________ model because electrons orbit around the nucleus like planets around the sun.

The ________ is a small, dense region at the center of the atom that contains protons and neutrons.

Tags

NGSS.HS-PS1-8

Chadwick's major contribution to atomic theory was the discovery of ________.

Explain how Thomson's cathode ray experiment led to the discovery of electrons.

Compare and contrast Rutherford's and Thomson's models of the atom.