The Historical Development of Atomic Theory

Question 1

Which particle is J. J. Thomson credited with discovering?

Revolt · Accepted Answer

electron

Question 2

How did the development of the earliest idea about atoms differ from the later work of scientists?

Revolt · Accepted Answer

It was based on the thoughts of an early philosopher.

Question 3

From his experiments, J. J. Thomson concluded that

Revolt · Accepted Answer

atoms contain small negatively charged particles that are called electrons.

Question 4

Which best describes the effect of J. J. Thomson’s discovery?

Revolt · Accepted Answer

The accepted model of the atom was changed.

Question 5

Which activity is the best demonstration of J.J. Thomson’s use of creativity in his work?

Revolt · Accepted Answer

interpreting the results of his experiment

Question 6

Which activity best demonstrates Ernest Rutherford’s creativity?

Revolt · Accepted Answer

designing an experiment to test the plum pudding model

Question 7

Which statement best summarizes the importance of Ernest Rutherford’s gold foil experiment?

Revolt · Accepted Answer

It showed that a nucleus occupies a small part of the whole atom.

Question 8

What could J. J. Thomson conclude from his experiments?

Revolt · Accepted Answer

Atoms must balance positive and negative particles.

Question 9

Which conclusion could be made from Ernest Rutherford’s gold foil experiment?

Revolt · Accepted Answer

Atoms are made up of mostly empty space.

Question 10

What did Ernest Rutherford’s gold foil experiment demonstrate about atoms?

Revolt · Accepted Answer

Their positive charge is located in a small region that is called the nucleus.

The Historical Development of Atomic Theory Answers