The Historical Development of Atomic Theory

Question 1

Which of these discoveries contradict components of Dalton’s atomic theory? Check all of the boxes that apply.

Revolt · Accepted Answer

A: Atoms contain smaller particles: protons, neutrons, and electrons.; C: Atoms of a given element can have different numbers of neutrons.; D: Nuclear reactions can change an atom of one element into an atom of another element.

Question 2

Select the model that best represents atomic theory after Rutherford’s results were discovered.

Revolt · Accepted Answer

B: B

Question 3

The pictures to the right, show two different models of the atom. Type in the letter of your answer.Which model best represents Dalton’s atomic theory?

Revolt · Accepted Answer

B

Question 4

Question 4

Revolt · Accepted Answer

A: Atoms contain negatively charged particles.; C: The electron has a specific mass.

Question 5

Which model best represents the modifications to the theory that Thomson’s results made necessary?

Revolt · Accepted Answer

A

The Historical Development of Atomic Theory Answers

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