Early Development of Atomic Models

Who was the first person to come up with the idea of the atom?

• Democritus

• Aristotle

• Dalton

• Thomson

Who created the solid sphere model of the atom?

• Dalton

• Thomson

• Aristotle

• Democritus

The cathode-ray tube was used to discover the ____ by ____.

• Electron by Thomson

• Electron by Dalton

• Proton by Thomson

• Proton by Dalton

Who created the plum pudding model of the atom?

• Rutherford and the plums were protons

• Rutherford and the plums were electrons

• Thomson and the plums were protons

• Thomson and the plums were electrons

This is an example of which model of the atom?

• Solid Sphere

• Plum Pudding Model

• Nuclear Model

What experiment did J.J. Thomson run to develop his model of the atom?

• Gold-Foil Experiment

• Definite Proportion Experiment

• Cathode-Ray Tube Experiment

• No experimentation was done

What does the word "atomos" mean?

• science is cool

• not reactive

• unable to be cut or divided

• small

What did the cathode-ray tube experiment prove?

• Atoms could be broken into smaller parts

• Atoms caused the changes in matter

• Atoms join to create compounds

• The center of an atom has a nucleus

Tags

NGSS.HS-PS1-8

What are electrons?

• an atom’s central regions, which is made up of protons and neutrons

• subatomic particles that have negative charges

• subatomic particles that have neutral charges

• subatomic particles that have positive charges

What can you conclude from the fact that scientists continue to update the atomic model?

• New information about atoms continues to be discovered
• Old information about atoms is completely useless
• Scientists did not have any information about atoms until a few years ago
• Scientists still have no idea what atoms look like