Models of the Atom Review

Whose model suggested that negative particles were mixed in with positively charged material - like seeds in a watermelon?

• J.J. Thomson

• Ernest Rutherford

• Niels Bohr

• Albert Einstein

Who discovered that the atom had an small, dense, positively charged center?

• Ernest Rutherford

• J.J Thomson

• Robert Millikan

• John Dalton

Place the following atomic models in order, from earliest to latest:

A) Rutherford B) Thomson C) Dalton

• B, C, A

• C, A, B

• A, C, B

• C, B, A

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

Who named the positive center of the atom the "nucleus?"

• Democritus

• Dalton

• Thomson

• Rutherford

Which scientist believed that elements differed from one another because their atoms had different mass?

• Democritus

• Dalton

• Thomson

• Rutherford

Which scientist proposed a new atomic model after discovering the electron in 1897?

• Dalton

• Thomson

• Rutherford

• Bohr

Where are electrons of an atom found?

• Nucleus
• Electron Cloud
• Some are in the nucleus and some in the electron cloud.
• They are moving everywhere.

Which of the following is a positively charged particle found in the nucleus of an atom?

• Electron

• Proton

• Neutron

• Quark

Which particle carries no charge?

• Neutrons

• Electrons

• Protons